Nature vs. Nurture Essay Example for Free

Nature vs. Nurture Essay A lot of people wonder where they get their freckles from, or their edgy and thrill seeking personality. This type of curiosity about where people get their traits from brings about the worldwide debate on nature vs. nurture. There are scientists who argue that people develop characteristics mainly based on their genetic makeup, and then their are people who say that environment and social interactions has more to do with a person’s traits than do genes. People often question why people are the way they are. Nature and Nurture often have a big impact on a person, and can help in explaining why they are a certain way. The nature vs. nurture debate encompasses a variety of major topics, leading to the idea that both nature and nurture influences people in their behaviors and decisions. Criminals go through different reasoning processes for why they commit a crime. They may have been brought up in a rough environment and are acting out, or because they simply just can not control themselves or their minds. There is evidence which suggests that there could be such a thing as gene mutations that determine our traits. These mutations control how the mind and body react to anger , whether it’s aggressively or controlled. According to Adriel Bettelheim, â€Å"researchers studying a dysfunctional Dutch family announced in 1993 that aggressive behavior may be linked to a single faulty gene that causes a shortage of enzymes needed to break down serotonin molecules that transmit signals in the brain.† This idea that criminal behavior may be associated with genetics, opens the doors to many controversial topics such as the insanity defense or the possibility of gene therapy. â€Å"For many centuries, people have tried to craft legal distinctions for the mentall y ill based on the belief that they should not be held fully responsible for their actions† (). The insanity defense is believed to often be abused and is the easy way out for guilty criminals to be held accountable. There are also people who support the insanity defense and say that the law needs to protect people who are too mentally ill to understand their actions. For some criminals, it’s not just a matter of their genes but more their environment that contributes to why they commit crimes. â€Å"Many social scientists say researchers, in a rush to ‘biologize’ behavior, are ignoring environmental influences, such as poverty, broken families and  racism† (). A lot of times the reason why criminals get in trouble with the law, is because they are acting out. Being aggressive or going against authority is like their coping strategy for dealing with their problems. †The frequency and nature of todays violence can only point toward an inherent anger or frustration† (). Ultimately, both nature and nurture can affect criminals and people ma y never be able to fully understand what exactly leads them to make bad choices. In addition to criminal behavior, there are also many other controversial topics regarding nature vs. nurture, such as intelligence and what contributes to peoples intellectual ability. â€Å"Mental ability seems closely related to the volume of those little gray cells in the brain; and differences in that volume seem to be largely a result of heredity†().Scientists are finding that intelligence goes along with the amount of brain cells (gray cells) towards the front of the brain which can be inherited through the family. There is evidence which suggests that if a person does really well with one mental task, they are more than likely to do really well on other mental tests as well. This concept is considered the general mental ability which is associated with those gray cells. Although intelligence is found as being directly associated with the brain cells, many people believe that intelligence is also based on a person’s environment and how they learn. For a lot of people intellectual ability is not purely genetic. Their intelligence can have a lot to do with how they were brought up or their environment in which they learned. Someone who goes to school regularly will probably have a higher intelligence level, versus someone who doesn’t. How people start off learning is also important because often times, if a child is intellectually stimulated at earlier ages, their brain will mature as the child gets older and that child will have a higher intellectual ability because they started learning sooner. IQ testing is a very controversial topic because many people disagree over whether or not it is a good judge of a persons actual intelligence. â€Å"The rift between psychologists over the value of IQ tests stems from a stark difference in the w ay they define intelligence: One camp sees a central, dominant intelligence, the other envisions multiple types of intelligence† (). Although scientists have not found hard evidence to prove that IQ tests are  not liable, social scientists continue to go against certain theories, such as the idea of general mental ability. They choose to believe and promote that there are different kinds of intelligence and everyone excels in different areas regardless of genetics. While genetics does play a role in intelligence, if a person works hard in achieving their goals they can become just as intelligent through challenging themselves and excelling in certain areas. The worldwide debate on nature vs. nurture also encompasses addiction. In a study about drug addictions researchers found, â€Å"the correlations with psychoactive substance use largely resulted from social environmental factors in adolescence† (). Family environments are important to young children and can have a huge affect on them as they get older. An unstable family life can cause people to resort to drugs or alcohol to help them deal with their emotions. If a child has social issues with their friends when they are young, that can affect them as well and cause them to resort to substance abuse to deal with their problems. â€Å"As people aged, however, more of the correlation in psychoactive substance use resulted from genetic factors†(). As substances such as alcohol are more readily available to adults, genetics can influence them more and also their decisions. If there is a history of substance abuse in the family, that person is more likely to become addicted in their lifetime. In the 1920’s, â€Å"Alcohol prohibition lead to a rise in violent organized crime, a trend critics have compared to the ongoing war on drugs(). Because so many citizens used alcohol and a lot of them apparently became dependent on it, they felt they had rights to it; so they organized a violent crime movement to prove that. People who were involved in this war with drugs were not just the poor or downtrodden, but also the middle class and the wealthy. Addiction has no boundaries, and can affect anyone whether it is through nature or nurture. Nature vs nurture will always be a major dispute over genes and environment, but ultimately they both have an impact on people. The reasoning behind criminal behavior is often questioned. Evidence that suggests there are gene mutations, which contribute to aggressive behavior, argues that nature can have a major role in criminal behavior, just like nature affects criminals  actions. In addition to criminal behavior, another worldwide topic discussed in the nature vs nurture debate is intelligence. Like mentioned earlier, intelligence is thought to be determined by genes and general mental ability; but there are social scientists who believe that there are many different types of intelligence, determined by environment and not just genetic make up. Addiction is another controversial subject because addiction can run in families but it also can happen to someone who had no history of it. Addiction also is very much related to a persons environment and how they deal with their problems. For those who wonder where they get their intelligence and edgy personality, or more seriously why they feel aggressive, or become addicted to drugs, think about nature and nurture , which contribute to peoples personality and traits.

Tuina Massage Essay Example for Free

Tuina Massage Essay Chinese massage (known as Tuina or Tui Na) stimulates acupressure points for healing energy to flow easily. Acupressure points have a high electrical conductivity at the surface of the skin and thus conduct the body’s energy effectively. Discover how to apply the same points and principles as acupuncture –using Chinese massage techniques and sensitivity of the human hand instead of needles. Learn to relieve a range of emotional complaints and common ailments such as depression, anxiety, headaches, backache, insomnia, nausea, carpel tunnel, and many more. Tuina Fundamentals Tuina and ancient Acupressure were developed in Asia over 5,000 years ago. Both are effective in the relief of stress-related ailments, in self-treatment and in preventive health care. Tuina releases tension, increases circulation, reduces pain and develops vibrant health. For more information on Acupressure, see Michael Reed Gach’s book, Acupressure’s Potent Points: A Self-Care Guide for Common Complaints from A to Z. ***** IT NEED TO BE IN 2SPACE FORMAT ***** NEED HEADING ON PAPER   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Tuina or ‘Tui na’ is an ancient Chinese Bodywork Massage Therapy that is frequently being utilized along with another Chinese holistic technique known as acupressure.   It was developed more than 2000 years ago, and harnesses the individual’s own internal energy known as ‘Qi’ (chi) to return them to a state of health and well-being.   Through this technique, Qi is made to rhythmically flow into the natural energy channels of the body known as the ‘meridians’.   This energy flows is considered to be the stimulating force for life. Manipulation, pressure, massage and traction provided during treatment, helps the body to naturally heal several disorders that affect the muscles, bones and the joints (such as sprains, arthritis, back pain, sciatica, etc); non-muscular skeletal disorders (such as those that involve the digestive system, respiratory systems and reproductive systems) and stress-related disorders (such as tension headache, carpel tunnel syndrome, anxiety, etc).   Besides, it helps improve circulation and the general health and wellbeing of the individual. Several techniques such as gliding, kneading, percussion, friction, traction, rotation, vibration, rocking, shaking, etc, are utilized during therapy sessions.   The meridians provide the life-giving energy to all the structures of the body such as joints, muscles, internal organs, tissues and the mind.   Any disturbance in the flow of Qi can cause several problems.   The Chinese have viewed disease as a condition in which the flow of Qi tends to get distorted.   When the flow of Qi is well-regulated, the individual is healthy in mind, soul and body. During this technique, manipulations help to correct the energy flow.   Various acupressure points may be stimulated in order to encourage the flow of Qi.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Acupressure is the technique in which pressure is applied to certain points in the body to treat any disturbance in the flow of energy (Qi).   In acupressure, 12 meridians or energy pathways are manipulated.   In actual Chinese medicine, 20 meridians exist; however, only 12 are considered important in acupressure that supplies energy to the tissues, organs and other structures of the body.   2 supplemental meridians (conception vessel and the governor vessel) are also manipulated sometimes. The 12 routinely utilized meridians include lung, pericardium, heart, large intestine, triple energizer, small intestine, liver, kidney, stomach, gall bladder and bladder.   Once the energy flow is stimulated, any imbalances in the flow are corrected, and the individual feels energetic and confident.   Along the 14 meridians, about 300 points exist known as the ‘acupressure points’ or ‘acupoints’.   Each of these points is given an alphabet-numerical code, and is manipulated with the fingers, hands, wrists, thumbs, knuckles, and sometimes with blunt objects.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The area at which the pressure has to be applied should be explored with a deep probing pressure.   Once the precise point is reached a stinging pain is felt, followed by a numbing or tingling sensation that migrates to other parts of the body.   With experience the points can be more easily recognized, but the sensitivity to pain reduces with time.   Once the point has been recognized, pressure should be applied over it for a few minutes.   The procedure should be repeated on the other side of the body. Once the procedure is completed, the individual can experience a lot of relieve from stress and tension, and an improvement in the flow of energy is immediately felt.   Sometimes, the symptoms may worsen following manipulation of the acupoint. In that case, the procedure should be stopped at that particular point.   If the treatment seems to be ineffective, the individual should search for other points lying close to the one manipulated.   In case, the individual gets only transient relief, the procedure should be repeated again.   The individual should remain relaxed, calm and concentrate during manipulation.   Besides, finger pressure, rolling with a blunted object (like a pen), pressing with the knuckle or palms, tapping, kneading forces, friction, traction, etc, can also be tried out and reapplied if it seems to be effective. References: Boyd, K. T. (2007). The Online Acupressure Guide. Retrieved January 4, 2007, from Stanford University School of Medicine Website: http://med.stanford.edu/personal/pointfinder/ CHIS-UK (2007). Acupressure. Retrieved January 4, 2007, from Complementary Healthcare Information Service UK Website: http://www.chisuk.org.uk/bodymind/whatis/acupressure.php Gach, M. R. (1990). Acupressures Potent Points Guide To Self-Care For Common Ailments. New York: Bantam Dell. Health How Stuff Works (2006). â€Å"How does acupressure work?† Retrieved January 4, 2007, from How Stuff Works Website: http://health.howstuffworks.com/question654.htm Health Information Organization. (2005). Tui Na (tuina) Chinese Bodywork Massage Therapy. Retrieved January 4, 2007, from Traditional Chinese Medicine and Acupuncture Health Information Organization Website: http://tcm.health-info.org/tuina/tcm-tuina-massage.htm Tuina (2007). About Tui Na. Retrieved January 4, 2007, from Tuina Australia Website: http://www.tuina.com.au/about.html

Neurological Aspects of Pain

Neurological Aspects of Pain 1.1. Functional Properties of Nerve Fibres 1.1.1. Properties of Peripheral Somatic Nerves Peripheral somatic nerves consists generally of somatic-motor, autonomic-motor and sensible fibres. 1.1.1.1. Somatic-motor fibres for the striated musculature The cell bodys of somatomotor fibres for the striated musculature are always lying in the brainstem (12 pare cerebral nerves) or the fore horn of the whole spinal medulla. The stimulus runs from central to peripheral (efferent). The lateral cutaneous femoral nerve consists of sensible fibres and no motor fibres. The shiatic nerve consists of 20% motor fibres, 30% sensible, and 50% sympathetic fibres. The gluteal nerves consist of pure motor fibres, sympathetic fibres and no sensible fibres. 1,2 1.1.1.2. Autonomic-motor fibres for the smooth muscles of blood- and lymphatic vessels The autonomic-motor fibres for the smooth muscles of the blood and lymphatic vessels are of sympathetic origin. Venes are not innervated. They function by the musculare pump system and in some cases by valves. The cells bodies of the autonomic-motor fibres are situated in the lateral horn between C8-L2. They are termed: the centro-ganglionar neurons. All motor neurons, situated in the spinal medulla go via the fore horn to the peripheral nerve. It must be mentioned that all smooth muscles can contract without external innervation (for example: heart, gut). This is due to the intrinsic nerve system with is influenced by the sympathetic and parasympathetic nervous system. 3-5 1.1.1.3. Sensible fibres for somatic structures The sensible fibres for somatic structures originate from muscles, tendons, capsules, joints, ligaments and bones. Their cell bodies are lying in the spinal ganglions of the corresponding nerve (= afferent). 2,6 1.1.1.4. Sensible fibres for autonomic structures: blood- en lymphatic vessels The cell bodies of the sensible fibres for autonomic structures are situated in the spinal ganglions of the segments where the sympathetic neurons start (SI-joint: T11-L1). The peripheral autonomic nerve contains generally autonomic-motor and sensible fibres and serves for the innervation of organs. Glands are always dubble innervated (sympathetic and parasympathetic), except for the adrenals. 2 Examples: The femoral arterie contains sensible fibres which go to the spinal ganglions and arrive in the dorsal horn where connections exist, via intercalar neurons, with the origins of the sympathethic fibres of the levels T10-T11. Knee joint: is sensible innervated via the sciatic nerve (posterior side of the knee), but in the knee capsule, sensible fibres exist which connect via the femoral arterie the levels T10-T12. 1.1.2. Properties of Peripheral Autonomic Fibres Peripheral autonomic nerves consist of autonomic-motor and sensible fibres. They innervate organs and glands. 1.1.2.1. Viscero-sensible fibres The cell bodies of viscero-sensible nerve fibres are situated in the spinal ganglions of those segments from where the sympathetic and parasympathetic neurons start. Example: the pelvis organs: S2-S4 and/or TLJ (= thoracolumbar junction). The TLJ receives a lot of information. Some of those stimuli go via the nervous supply in the blood vessel wall. 2 1.1.2.2. Motor fibres for smooth muscles The parasympathetic primary cells are situated in the brain stem to the level of C2 and the lateral horn of S2-S4. The sympathetic origin is situated in the lateral horn of C8-L2. 2,7,8 1.1.3. Axoplasma Flow of the Axons Materials and substances are moved within the cytoplasm of all cells. In the axoplasm (= cytoplasm of neurons), structures such as the smooth endoplasmic reticulum, ribosomes, microtubules and neurofilaments likely take part of the axoplasmic transport mechanism. Perhaps the human movement plays a role in this intracellular motility 9. In the cytoplasm of nerve fibres nutrients and transmitters are moved. At the nerve ends vesicles are located, that continue the transport into the gap junction. The transport in the axoplasma is termed antidrome and orthodrome transport. Antidrome (antegrade) transport occurs from central to the periphery and orthodrome (retrograde) transport in the opposite direction.1,10,11 For the sciatic nerve the antidrome transport is rather fast (12 hours), the orthodrome transport is slower (48 hours). 1.1.3.1. Signal transfer of the peripheral nerve fibres Ion-channels and receptors play an important role in the signal transfer of the peripheral nerve fibres. The ion-channels are located on the extremities of the fibres. They make the transport for the neurotransmitters possible. Receptors are specified. Every cell has ÂÂ ± 1 million receptors. The gates of the ion-channels (mostly proteins) can be inhibitory or excitatory. The Swann-cells are spread over the axon and form de myelin sheet. The myelin sheets are interrupted by the knots of Ranvier. In the CNS they are termed glial cells. The glial cells have several functions. The myelin sheets have a certain thickness. Unmyelinated axons have Schwann-cells as well. In myelinated axons the stimulus progresses salutatory and in unmyelinated axons the stimulus progresses slowly. The signal transfer of the peripheral nerve fibres has 3 kinds of stimulus progress being chemical transport, electric stimuli progression and axoplasm flow. Chemical transport occurs at the nerve ends, and consists of neurotransmitters. The transport depends of the kind of ion-channel, the neurotransmitter and the receptor. Electric stimuli progress over the axon and occur by opening of the ion-channels stimulation the own nerve ends due to production of the neurotransmitters. The speed of transmission depends of the presence of a myelin sheet and the diameter of the fibres. The axoplasm flow of the neurotransmitter in axoplasma (= chemical) occurs in 2 directions. Sometimes the pain can occur 24 hours after injury! It can also be very slow (up to 48 hours) and be resposible for the delayed onset of pain. 1,11 1.1.3.2. Morphologic and functional classification of nerve fibres: Understanding pain phenomen the morphologic and functional properties of nerve fibres is important. In time several classification systems have been investigated and proposed. 1.1.3.3. Classifying axons according to their conduction velocity In the 1920s and 1930s, there was a virtual use of classifying axons according to their conduction velocity 13. Three main categories were discerned, called A, B and C fibres: C fibres are the smallest and slowest. Mechanoreceptors generally fall in category A. The A group is further broken down into subgroups designated: the a fibres: the fastest the b fibres the d fibres: the slowest The muscle afferents axons are usually classified into four additional groups: I: the fastest II, III and IV: the slowest, with subgroups designated by lower case roman letters. 1.1.3.4. Properties of the A-d, A-b sensors or type I en II fibres The A-a and A-b fibres have low threshold properties. They are low threshold afferents/efferents, they have a quick adaptation, are bi- or monosynaptic and unimodal (= mechanosensors: only sensible for mechanical stimuli). They cross the midline in the spinal medulla. The A-b provides information about normal pressure or strain tension and the A-a provides information about position changes of joints in space. They give information about the smooth touch and kinesaesthesis in the skin. 1.1.3.5. Properties of the A-d and C sensors or type III en IV fibres 1.1.3.5.1. The A-d sensors or type III fibres The A-d or type III fibres are selective and have a slightly higher threshold than the A-a and the A-b sensors. They have a longer adaptation time. After a pin prick the pain keeps going on for a time which is a specific property of the A-d sensors. They are multisynaptic and cross the midline in the spinal medulla. A-d sensors are polymodal. They provide information about mechanical stretch and pressure forces from normal to noxious. They give information about temperature from normal to noxious stimuli. From 36,5ÂÂ °C tot 42ÂÂ °C especially C-fibres are involved. From 36,5ÂÂ °C tot 38ÂÂ °C the A-d fibres are responsible. A quantity of those fibres is noxious. They are termed: nocisensors but not all. Some measure only normal temperatures and they become nocisensors in case of tissue injury. 11 1.1.3.5.2. The C sensors or type IV fibres The C or type IV fibres are selective and have a high till very high threshold. They are slow to very slow with a long adaptation time. They have tonic and continuous activity properties. They cross the midline in the medulla medulla and are polymodal. The C fibres measure the chemical consistence of tissues from normal to noxious. They measure temperature from normal till abnormal (= noxious). Some of those fibres are nocisensors but not all of them. Example: the sensibility of the knee consists of 80% normal sensibility sensors and 20% nocisensors. 11 1.1.3.5.3. Difference between nocisensor- stimulation and pain A nocisensor measures the damage of injured tissue. A nocisensor can but must not necessarily provoke pain. A part of the A-d and C-fibres are nocisensors. They measure the damage or the almost-damage (mechanic, temperature, chemical). Their noxious stimulation does not always lead to pain perception. Here fore the stimulus must attain the thalamus and cerebral cortex, otherwise there is no pain sensation. Not all nociceptory stimuli rise so high to the midbrain or cortex. A lot of stimuli extinguish in the spinal medulla, the ascending pathways or in the brainstem. The stimulus attains the pain centres when the intensity of one stimulus is sufficient or when summation occurs of several stimuli in parts of the dorsal horn. As well reflectory (unconscious) as cognitive (conscious) reactions occur and the nocisensors will provoke pain, in case of severe damage. Thus, not all nocisensors provoke pain but they can be considered as normal pain fibres. It is logic that if a nocisensor is s ufficiently stimulated it will provoke the sensation of pain. A-d en C fibres can give pain thats not only caused by the damage itself, but as a result of the damage as well. A pain feelin which is more intense than normally expected is termed hyperalgesia. For example, when ice is applied on the skin it hurts but ice applied on a burned skin does hurt even more. When punctuated stimuli are applied on the course of the sciatic nerve it normally hurts but in case of sciatica it hurts even more (= hyperalgesia). Hyperalgesia is hypersensitivity on a stimulus that normally hurts, due to over stimulation of the nocisensors. The A-a and A-b fibres normally do not give pain, because they are not nocisensors. They register only normal values. Under certain circumstances they provoke pain. This happens in case of injured tissues or nerves or when the nocisensors become active. When nocisensors already give pain as a result of a decreased threshold, then the A-a and A-b fibres become sensiti ve as well. A light pressure on the pain area will also be painful. A low pressure- or strain force on the skin, tendons or muscles normally provoke no pain, but in case of damage it will well provoke pain. This is termed allodynia. Allodynia is pain that is caused by a stimulus that normally doesnt hurt due to an increased sensitivity of the the A-a and A-b fibres. This phenomon gives an opportunity to test the pain perception of the nervous system by use of pricking or brushing tests on the painfull area. There is a difference between nocisensor stimulation and the pain interpretation. 11 Table 5: Difference between nocicensor stimulation and pain. By use of selective stimulation the A-a and A-b fibres can be stimulated without that the A-d and C-fibres become active. This is caused by the low threshold of the A-a and A-ÃÆ'Ã… ¸ fibres compared with the A-d and C-fibres. A-d en C-fibres cant be stimulated selectively by use of mechanical stimuli because at the moment those fibres are stimulated; already the A-a and A-ÃÆ'Ã… ¸ fibres are active. When those become active, all fibres were stimulated. Also in case of nociception all those fibres are active. Selective stimulation can be used during TENS application or during active en passive mobilisations applied under the pain threshold level. 11 1.1.4. Hierarchy of the Nervous System The information processing in the nervous system happens on 4 levels. As well as the peripheral nerve ends, the dorsal horn, the brainstem and sub cortical and cortical levels are involvend. 1,7,11 1.1.4.1. The peripheral nerve ends The peripheral nerve ends are responsible for the uptake of information. The receptors are modulated by the state of surrounding tissue and the condition of the peripheral nerve. 1.1.4.2. The dorsal horn of the spinal medulla The dorsal horn modulates the incoming signals and is influenced by the state of the dorsal horn and the quantity and kind of gathered stimuli. 1.1.4.3. The brainstem The brainstem provides the primary responses with autonomic and hormonal modulations as a response to stimulation. 1.1.4.4. Sub cortical and cortical levels The sub cortical and cortical area provides the conscious cognitive and psycho-emotional modulation. The processing of the information and response on stimulation depends on the hierarchic manner, but always occurs with a total integration of the whole nerve system. 1.1.4.5. The Archi-, Paleo- and Neo level of the nervous system The nervous system can be ordered depending on a hierarchic manner in an archi, paleo and a neo level. 7 1.1.4.5.1. The Archi level The archi level consists of the gray matter (dorsal horn) of the spinal medulla, the ascending multisynaptic pathways in and around the gray matter, the medial pathways of the anterolateral quadrant, the mid part of the cerebellum and the brainstem (reticular formation). It is responsible for the most automatic movements after Hughlings Jackson. 7 1.1.4.5.2. The Paleo level The paleo level consists of the ascending pathways of the anterolateral quadrant, the descending pathways in the ventro-lateral quadrant, the hormonal and vestibular nuclei in the brainstem, the hypothalamus, certain parts of the cerebellum and the limbic system. Humoral influences from the liquor can influence (endofins) the sensibility of the pain system. 7 1.1.4.5.3. The Neo level The neo level consists of the dorsal ascending pathways, the dorso-lateral and ventral descending pathways, the cerebellar cortex, the lateral thamalus nuclei and the cerebral cortex. It is responsible for the cognitive mental processes, accurate skills and least automatic functions. 7 1.1.4.6. Phylogenetic development of the nervous system The phylogenetic development of the nervous system differs in time for the different levels. The archi-system is the oldest and is identical to that of the lower vertebrates. It is completely developed when born. The paleo-system is younger than the archi-system. It is identical of that of the lower vertebrates but only half developed when born. The neo-system is het youngest system in the phylogenetic evolution. It is much more developed than that of the lower vertebrates and not developed when born. 7 1.1.4.7. Functional properties of the different hierarchic systems of the nervous system Specific properties can be indicated to the different hierarchic levels of the nervous system. 1.1.4.7.1. Functional properties of the Archi level The archi level consists of C and A-d fibres. It is a relatively slow and tonic (continuous) working system that stands for the basic needs of life e.g.: basic survival or most automatic movements and autonomic functions such as basic tonus regulation in the brainstem and medial cerebellum. It is responsible for primary pain modulation e.g.: redraw reflex and increased tonus. 1.1.4.7.2. Functional properties of the Paleo level The paleo level consists especially of A-d, A-b, and C-fibres as well. It is a relative quicker system but also has tonic activity properties. The paleo level supports the archi-level by use of hormonal adaptation and psycho-emotional adaptation. It takes part of the autonomic function (hormonal function), fight/flight reactions in case of stress and pain and posture regulation (static posture balance). 1.1.4.7.3. Functional properties of the Neo level The neo level consists especially of A-a and A-b fibres and is very quick with phasic responses on stimulation. It analyses the information of the archi- and paleosystem and is guided by use of cognitive responses. The least automatic movements are guided and conscious movements. It regulates the dynamic posture balance and automatisation of movements. It is responsible for the organ sense perception and dissociated movement. 1.1.4.7.4. Interaction and control of the different hierarchic systems in the nervous system General principles of interaction among the different hierarchic systems in the nervous system can be summarized as follows. The paleo-system controls the archi-system and guides it. The neo-level controls the archi- and paleo system and guides both. The neo-level surrounds literally the archi and paleo level. The grey matter is situated medially in the nervous system medial in spinal medulla, the white matter laterally. The neo-system keeps the paleo-level and archi-level in harness. The hierarchic construction of the nervous system can be seen as a gate control system that exists on all levels. 7 1.1.4.7.5. Gate-control in the peripheral nerve fibres Axo-axonal connections between lower and higher fibres exist. The A-a and A-b fibres give off collaterals in the dorsal horn. The A-a and A-b attain the spinal medulla faster and prepare it for the arrival of A-d and C-stimuli. Selective stimulation of higher fibres (A-a and A-b fibres) inhibits the working of the fibres of lower order (A-d and C-fibres). 1.1.4.7.6. Gate control in the dorsal horn At the level of the dorsal horn interaction and control mechanisms exist and this phenomen known as Gate-control in the dorsal horn is also known as the gate theory of Melzack en Wall. The outlets of the A-a en A-b neurons shunt on the outlets of the A-d and C-neurons and their neurotransmitters close the ion-channels of these. The descending pathways of the paleo- and neosystem do the same and work on the interneurons and inhibit the A-d and C-neurons. 11 1.1.4.7.7. Gate-control in the brain The cortical pathways control the sub cortical pathways. They inhibit the brainstem reflexes. Conscious movements and intentions inhibit unconscious tonic reflexes (Example: relaxation). The cortical and sub cortical pathways regulate a directed and conscious life. The brainstem provides the autonomic support. This is all controlled by neurotransmitters. The perception of nociceptive pain not only involves the sensation transmitted and regulated by peripheral and central neurons, but is also affected by higher brain functions. 11 1.1.4.7.8. The uptake of nociception information A-d and C-fibres are the only fibres that can registrate nociception. The A-d fibres are quicker and give epicritic pain when the stimulus is attaining the pain centres. Epicritic pain means precise localisation with immediate redraw reflexes. The kind of pain is described as stabbing, boring, tearing or pulling. The impulses of the C-fibres attain the pain centres much later. They give protopathic pain, which is a continuous pain. That pain is not precisely located. Protopathic pain is burning, booring of a kind and continues much longer. It goes together with autonomic reactions, for expample: oedema. 11 1.1.5. The dorsal horn of the spinal medulla 1.1.5.1. General survey of the classification of the grey matter of the spinal medulla The grey matter is divided in the 10 layers of Rexed. This system is named by Rexed who discovered that the neurons in the dorsal horn where organised in layers depending on their function. Every layer is present in different segments and forms rostro-caudal nuclear columns. The counting happens from the dorsal horn to the anterior horn. Every layer is in contact with another by interneurons and dendrites. Layer I and II: nocisensory outlets of both: musculo-skeletal and visceral structures Layer III: intersegmental ascending pathways (dorsal proprium tract) and outlets to the spinothalamic tract (anterolateral quadrant) Layer IV: exclusive nocisensors from the musculoskeletal system Layer V-VI: fibres arriving from the nocisensors of the skin and viscera Layer VII: lateral horn: interneurons and sympathetic neurons Layer VIII en IX: motoneurons for musculoskeletal system Layer X: hormonal neurons In all levels descending pathways arrive from diverse levels of the brain. 1.1.5.2. Somatotopic ordering of nocisensors in the dorsal horn In layer I-II the nocisensors of viscera and musculo-skeletal structures are laying next to each other. They are ordered in a sagittal way from medial to lateral. The medial structures project medial and lateral structures project laterally. In layer V the nocisensors of certain skin areas are lying next to the nocisensors of viscera. Those are ordered in horizontal layers. For example: the organ-nocisensors under the level of the diafragm are lying next to the skin sensors from Th7-Th10. 1.1.5.3. Segmental interactions in the dorsal horn Normal reactions in musculo-skeletal influence the nocisensoric function. Outlets of nocisensors stimulate interneurons. There exists interaction with the spinothalamic tract and interaction with motoric anterior horn cells (somato-somatic relation). Normal reactions in musculo-skeletal nocisensoric function and influence the outlets of nocisensors stimulate the interneurons causing interaction with spinothalamic tract and with the sympathetic lateral horn cells (viscero-visceral relation). 11 Abnormal reactions can occur when the outlets of nocisensors infect the other nocisensors. Those react in turn causing interaction between motoric and visceral responses. This results in a somato-visceral relation, a somato-sympathetic relation and a viscero-somatic relation. 1.1.5.4. The Importance of Wide Dynamic Range Neurons In layer III, wide dynamic range neurons (WDR-neurons) exist. 21 Those WDR-neurons are interneurons that connect all the A-d en C-fibres from the dorsal horn. They project on the spinothalamic tract (antero-lateral quadrant). The ventral pathways go to the reticular formation, medial thalamus and the medial limbic system. The lateral pathways go to the lateral thalamus and cortex. They connect all visceral and motoric stimuli (= summation) with as consequences that motoric and visceral stimuli are sent together to the brain. The brain receives segmental information and no individual information. The brain can project pain to segmental connected structures. This is termed referred pain. Examples are: the stomach ulcer can provoke inter scapular pain or cardiac complaints and can give ulnaris nerve pain. Pain does not always indicate the exact location and origine. Anamnesis, assessment and clinical reasoning are very important. 1.1.5.5. Inhibition and excitation of the dorsal horn Inhibition and excitation of impulses in the dorsal horn can be caused by outlets of peripheral nerves. For example the A-a and A-b can inhibit the A-d and C fibres (pre-synaptic inhibiton). The outlets of the descending pathways can influence the the nerve ends and the interneurons (postsynaptic inhibition/excitation). The interneurons themselves can cause pre- or postsynaptic inhibition/excitation. Summation of stimuli defines the state of the dorsal horn. If a segment is excited or inhibited depends on the som of stimuli. Nocisensory impulses of the peripheral nerves always excite the dorsal horn. Summation of exciting nocisensoric impulses is defined by spatial and temporal facilitation. Temporal facilitation means the timing; spatial facilitation, the diverse structures that are involved. Impulses of A-a and A-b neurons act generally inhibiting. The impulses from the descending pathways can act in both ways. They are also regulated by temporal and spatial factors. The sum of sti mulating and inhibiting stimuli defines the state of the dorsal horn. An excitated dorsal horn provokes a lot of irradiating pain. 1.2. Assessment of Primary and Secondary Hyperalgesia 1.2.1. Definition of primary hyperalgesia Changes in the local sensibility of the afferent neurons as a result of a lesion in the peripheral tissues are termed hyperalgesia. In case of an increased sensibility of the A-a and A-b fibres the primary hyperalgesia is termed allodynia. In case of an increased sensibility of the A-d and C fibres the primary hyperalgesia is termed hyperalgesia. The lesion in the peripheral tissue can be of inflammation or neurogenic origin. 22 1.2.1.1. Pathophysiology of primary hyperalgesia In case of tissue injury bradykinin and ATP is produced at the site of lesion. Those mediators stimulate the blood- and lymphatic vessels, the mast cells and nociceptors. In the circulation inflammatory mediators are released aswell as histamine, serotonin, NGF, leucocytes, trombocytes and others. C-fibres released neuropeptides such as SP and CGRP. Those modulate and stimulate the release of other inflammatory mediators aswell. All those mediators are termed the inflammatory soup. Those mediators also stimulate the C-fibres which causes a vicious circle. The sympathetic nerve terminals are stimulated by inflammation and release noradrenalin which also stimulates the C-fibres. The sympathetic coupling between C-fibres and sympathetic end neurons occurs. The presence of inflammatory mediators decreases the threshold of all types of endneurons with as a result local allodynia and hyperalgesia. The allodynia and hyperalgesia can spread in the surrounding tissue, by stimulating the surro unding neurons. This is termed the flair zone. 22,23 Figure 16: Consequences of tissue injury: the inflammatory soup. 14 1.2.1.2. Primary hyperalgesia and the dorsal horn The A-d mechanoreceptors and nociceptors, and C-nocisensors stimulate the dorsal horn of somatic connected segments. As a consequence a temporary wind-up can occur. A wind-up is an over stimulation that can hold on for 72 hours. A refectory muscular reaction occurs around the lesion aswell. As a result the stimulation via the ascending pathways (antero-lateral quadrant) to the brain increases. Protopatic pain (quick, stabbing pain) followed by epicritical pain (boring, continuous pain) occurs. The brainstem regulates the autonomic reactions further such as sympathetic, hormonal, and emotional. The C-nocisensors give stimuli to the sympathetic connected segments. As a result the sympathetic system stimulates the C-endneurons (= sympathetic coupling) and vasoconstriction on the arterioles and lymphatic vessels. 20,24 1.2.1.3. Primary hyperalgesia and nerve injury When compressed inflammation occurs as prescribed above. In case of long standing injury, an ectopic injury occurs. This can be located on different locations on the peripheral nerve with the result that hyperalgesia and allodynia occurs on the course of the nerve, the connected dermatomes and this from the nerve root! In the spinal ganglion of the nerve, the sympathetic endneurons grow round the nerve cells with the occurrence of basket formations as a result. Consequently sympathetic maintained pain (SMP) occurs, also termed causalgia. This phenomon can continue for 7 to 10 weeks after the lesion but can also continue afterwards. 10 25 To summarize we can state that inflammation provokes a local hyperalgesia and allodynia, which spreads over the flair zone. Locally a vicious circle between the inflammatory soup and C-fibres takes place and sympathetic coupling between sympathetic end-neurons and C-fibres occurs. This continues until the tissue heals. Normally the medulla reacts with a temporary wind-up and a normal stimulus-response reaction. In case of neurogenic injury, causalgia may occur and sensitisation of the dorsal horn is possible. 22 1.2.1.4. Clinical pain assessment in case of primary hyperalgesia During the pain assessment, in case of primary hyperalgesia, when brushing or by use of punctuate stimuli the following properties are local allodynia and hyperalgesia restricted to the flair zone. In case of a nerve injury the flair zone is restricted to the course of the nerve root. Local sympathetic reactions occur when inflamed but are restricted in time. In case of allodynia and hyperalgesia when brushing and applying punctuated stimuli on the course of the nerve or a part of it, sympathetic reactions in the dermatome of the nerve can occure aswell. 22 1.2.2. Definition of Secondary Hyperalgesia An increased sensibility of all types of nerve fibres that continues outside the flair zone of the original lesion, linked to the course of the hyperalgesia and allodynia around the tissue, is termed secondary hyperalgesia. 22 1.2.2.1. Pathophysiology of secondary hyperalgesia When tissue is injured, nociceptors stimulate the interneurons by use of neurotransmitters such as SP, CGRP, NO, Ca, etc. The A-a and A-b neurons provide inhibiting neurotransmitters and the descending pathways give exciting or inhibiting mediators. The WDR-neurons receive al those impulses and send them to the spino-thalamic tract. WDR-neuron receptors differ. Some open ion-channels using inhibiting neurotransmitters, others open ion-channels using exciting neurotransmitters depending on the kind of receptor. If the stimulus acts inhibiting or exciting depends on the quantity of the opened inhibiting- or exciting ion-channels. In case of secondary hyperalgesia, more excitatory stimuli exist and insufficient inhibiting ways are activated. The WDR-neurons will work exiciting as well because of the fact they do not only activate the spino-thalamic pathways but also on the incoming stimulating neurons. As a result a vicious circle occurs in the dorsal horn. This provokes a decreased thr eshold of the present neurons. The sensors are also stimulated by the dorsal horn and not only by the local lesion. They become sensitized over their whole course with the consequence that the central hyperalgesia is linked to the lesion. When the local lesion is healing, the central allodynia will also disappear. Hyperalgesia is not as much linked to the course of the lesion but can last longer. Its origin is mostly caused by temporal and spatial summation of exciting stimuli. 22 1.2.2.2. Clinical pain assessment in case of secondary hyperalgesia During the pain assessment, when touching (brushing) and applying punctuate stimuli local hyperalgesia en allodynia and extending hyperalgesia and allodynia can be observed. When the pain occurs outsite the spinal column area the touching (brushing) and applied punctuate stimuli starting from the lesion and over the dermatome near by. The application must be enlarged to the neighbouring dermatomes and also to the corresponding segments of the spine. Always compare with the opposite side. Differentiate allodynia and hyperalgesia. 22 In case of primary hyperalgia the allodynia and/or hyperalgesia is restricted to the lesion area and flair zone. The allodynia disappears before the hyperalges

eight of Great Expectations by Charles Dickens. :: English Literature

Compare the The Darkness Out There by Penelope Lively and chapter eight of Great Expectations by Charles Dickens. In your essay explore plot, characters, setting, themes, language and structure. in The texts I have studied, going to discuss and compare are 'The Darkness Out There' by Penelope Lively and 'Great Expectations' by Charles Dickens. These texts were written in different periods of time, therefore they have differences in their outlook on life. For e.g. Great Expectations was written in the pre-20th century and includes major variations about his way of life, however The Darkness Out There was written in the 1970's and contains a younger more up to date example of text. 'The Darkness Out There' is a story of two teenage children who help out the elderly; their names are Kerry (the boy) and Sandra (the girl). These two children are about to discover during their visit how looks and stereotypical behaviour can be deceiving, towards the end of this story Sandra starts to realize how blind she has been up to now in her life and feels a possible need for a change of character. Chapter Eight of 'Great Expectations' is part of a tale of Pip's journey in life, at this point in the story he is going to meet Mrs. Havisham. She is a wealthy old woman who helps and takes on children, turning them into fine gentlemen and ladies, this visit to the old woman turns out to have a deeper incentive than it might seem. Mrs. Havisham seems to have sinister motives and strange fantasies of how she wants to define Estella. Different characters and settings make this an entrancing story. k work info In both of the texts the children visit an elderly lady, in 'The Darkness Out There' Kerry and Sandra are helpers for the local old people neighborhood service. On this day they both go to help an old Mrs. Rutter with her chores, however they do not bargain on what they are about to hear. In 'Great Expectations' Pip is going on a visit to Mrs. Havisham's manor house, unlike the other text his visit is about his future and how he will be brought up. Even though the children are going to visit the old women, the characters in the story are all afraid of different things. In 'The Darkness Out There' Sandra is afraid of the woods known as Packer's End, she is scared of it because of the secrets and stories it contains for example in the text, it says that 'She wouldn't go in there for a thousand pounds' and 'You didn't know who was around in

What It Means To Be Australian :: essays research papers

What It Means To Be an Australian Australia is a very unique place, along with our multiculturalism there is also a strong heritage surrounding us. At first thought of Australian heritage we think about such landmarks as Uluru, The Sydney harbour bridge and The Sydney opera house, The Great Barrier reef and other internationally recognised places. But our heritage goes much deeper than that; it is far more than outstanding icons. Along with these icons there are also unsung places like the old cattle stations, Aboriginal missions, migrant hostels, War memorials, our unique wetlands and the towns and cities we have built. Adding all of these things together, helps to tell the story of who we are and how we have shaped this land in the unique identity it has today.   Ã‚  Ã‚  Ã‚  Ã‚  But familiar landmarks and also the unfamiliar ones aren't the whole make-up of Australia's heritage. It's the people that make a difference. Australia is made up of people from all walks of life who have migrated here for different reasons. Among these, the most common migrants are from Greece, Italy, Russia and Asia. Australia is made up of material culture: the places and objects, but also Living culture: In forms such as Music, Crafts, Literature etc. It is an interplay between international cultures and beliefs, the claims of nationalism and ethnic and religious traditions, as well as the local and community priorities that’s make up the unique Australian heritage. The Aboriginal people of Australia were here thousands of years before European settlement and we forced them to adapt to the changes of environment around them. This change might be for better or worse, but we will never find out. But with the European settlement came the birth of industry, agriculture, forestry, fishing, mining, manufacture, electricity, gas and water just to name a few.

History of Gypsies Essay -- Gypsy

The first and to date only reliable assertion of the origin of word Gypsy for the members of â€Å"specific† group, dates back to 1068. At that time the Georgian monah st. George Antonski, from the monastery of Iviron (Greece) reports to his people that on the mountain of Athos in the time between 1001 and 1026 a group of â€Å"Athiganos† arrived. The word Athigatos or Acinkan in Greek would be â€Å"untouchable†. Different synonyms of this word were used later as name for â€Å"that† nation around Europe. In literature we find: latin-Cingarus, Turkey-Cingeneler, France-Tsiganes, Germany-Zinger, Russia-Cjganji, Hungary-Ciganjiok, Italy-Zingari, Spain-Gitanos. In Croatia the name is Cigani and in Dubrovnik Republic Jedupi or Egyptians. The name Egyptians was probably brought to Dubrovnik by Italians (Greece was at the time under Venetian rule) where together with the former name Jedupi for Gypsies the name Egyptians started to be used. On 08. April 1791 the first World congress of Gypsies was held in London. Important decisions and accepting of Roma flag, official anthem and official languages were brought. It was decided that the flag consists of two basic colours that symbolises everlasting wandering of Roma. The green is a symbol of boundless natural space as freedom of movement. The blue is symbol of sky and in the middle of the flag is a wheel which marks the everlasting journey of Roma. The official anthem is famous Roma song â€Å"Gelem, Gelem† and as official language Lovari Roma language was accepted. In the same time as unique world wide used name for Gypsies was term â€Å"Htom†, which in Gypsy-lovari language means a man. Sound ht does not exist in graphic system therefore for the sake of easy writing this sound is spelled as sound R. There... ...father Stepan Iuan Sainouich dictus Oliuerich, 1490. father Sain We strongly believe that the Dubrovnik Gypsies are ancestors of today’s Lovari Roma as this tradition of names and surnames can today be found among Lovari Roma in Croatia. Music Anthem: Gelem,gelem Anthem lyrics: Gelem, gelem I have travelled over long roads I have met fortunate Roma I have travelled far and wide I have met lucky Roma Oh, Romani adults, Oh Romani youth Oh, Romani adults, Oh Romani youth Oh, Roma, from wherever you have come With your tents along lucky roads I too once had a large family But the black legion murdered them Come with me, Roma of the world To where the Romani roads have been opened Now is the time - stand up, Roma, We shall succeed where we make the effort. Oh, Roma adults, Oh, Roma youth Oh, Roma adults, Oh, Roma youth

Julio Nieto

Cede knew the athletes were losing vital water and minerals, so he mixed salt and potassium into a balancing drink. ) After players spit out the first, foul-tasting samples, Cadet's wife suggested adding lemon juice and sweetener. (5) The rest Florida Gators stopped wilting and roared Into a winning streak. (7) The new drink was named in is history. (6) Sipping the new beverage, the their honor. (8) Other Florida teams are the Hurricanes and the Seminole. (9) Today 8 million bottles of Storage are consumed dally. Paragraph 2 ) Technology enables people like the famous physicist Dry. Stephen Hawking to continue working despite serious physical disabilities. (2) For more than 45 years, Dry.Hawking has lived with Lou Gearing's disease, which attacks the muscles, but his brilliant mind works perfectly. (3) He can no longer walk, speak, or feed himself. (4) Nevertheless, a high-tech wheelchair with computer attachments allows him to continue his research and stay in touch with friends and colleagues around the world. (5) His computer is hooked up full-time to the Internet. (6) To speak, he chooses words displayed on the computer screen. And then an electronic voice machine pronounces each word. (7) A pressure-sensitive Joystick even lets Dry.Hawking make his way through traffic. 8) In his home, Infrared remote controls operate doors, lights, and his personal entertainment center. (9) He has three children with his first wife, Jane, and one grandchild. (10) Dry. Hawking continues to search for new ways to overcome his problems through technology. And connect with a community of people who â€Å"speak from the heart. (7) Poetry slams are gaining popularity as schools, arts organizations, and groups of young writers start poetry clubs or sponsor contests. 8) Now, as online videos of the winning performances reveal the power of poetry slams, the excitement has spread worldwide. Chapter 2 Cross out any prepositional phrases in each of the sentences below. Then either ci rcle each subject and underline each verb or highlight the subject and verb in different colors. * 1. Do you watch videos on Youth? * 2.This hugely popular website grew quickly out of an invention by three friends. * 3. One night, Steve Chem. shot a video of his pals Chad Hurley and Jawed Karri. * 5. Surprisingly, the three buddies could find no easy way of sharing this video online. * 6. Their solution was a video-sharing website. * 7. Their friends loved it and inspired the young men to launch Youth in 2005. * 8. Within two years, Youth had attracted millions of visitors and millions of dollars from investors. * 9. Very easily, users can view or post videos on the site. * 10.Today, Youth's millions of videos inspire creativity, news reporting by everyday people, and some engaging craziness. Chapter 31 practice 2, 3, and 4 The first sentence of each pair that follows contains an irregular verb in the past tense. Fill in have or has plus the past participle of the same verb to compl ete the second sentence. * 1. Sean took plenty of time buying the groceries.