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Stimulation

Stimulation

Stimulation is the irritating action of various agents (stimuli) on muscles, nerves, or a sensory end organ, by which activity is evoked; especially, the nervous impulse produced by various agents on nerves, or a sensory end organ, by which the part connected with the nerve is thrown into a state of activity. The word is also often used metaphorically. For example, an interesting or fun activity can be described as "stimulating," regardless of its physical effects on nerves.

Overview

Stimulation in general refers to how organisms perceive incoming stimuli. As such it is part of the stimulus-response mechanism. It is well known that simple organisms broadly react three ways to stimulation. Too little stimulation causes them to stagnate, too much to die from stress or inability to adapt, and a medium amount causes them to adapt and grow as they overcome it. Similar categories or effect are noticed with psychological stress with people. Thus, stimulation may be described as how external events provoke a response by an individual in the attempt to cope.

Over-stimulation

Psychologically, it is possible to become habituated to a degree of stimulation, and then find it uncomfortable to have significantly more or less. Thus one can become used to an intense life, or television, and suffer withdrawal when they are removed, from lack of stimulation, and it is possible to also be unhappy and stressed due to additional abnormal stimulation. It is hypothesized and commonly believed by some that psychological habituation to a high level of stimulation ("over-stimulation") can lead to psychological problems. For example, some food additives can result in children becoming prone to over-stimulation, and ADHD is a condition inwhich over-stimulation is a part. It is also hypothesized that long term over stimulation can result eventually in a phenomenon called "adrenal exhaustion" over time, but this is not medically accepted or proven at this time. What is sure is that ongoing, long term stimulation, can for some individuals prove harmful, and a more relaxed and less stimulated life may be beneficial.

Stimulus

The term "stimulus" (plural: stimuli) has several related meanings:
- In physiology, a stimulus is something external that elicits or influences a physiological or psychological activity or response.
- In psychology, anything effectively impinging upon any of the sensory apparatuses of a living organism, including physical phenomena both internal and external to the body.
- In other fields, a stimulus is anything that may have an impact on a system; an input to the system. (E.g., an economic stimulus.) In most contexts, a stimulus can be described as "stimulating", thereby causing "stimulation" or "over-stimulation". Although related, the word's meaning is distinct from that of "stimulant."

Nerve

"Nerves" redirects here. For the musical group, see The Nerves. For other uses, see Nerve (disambiguation). A nerve is an enclosed, cable-like bundle of nerve fibers or axons, which includes the glia that ensheath the axons in myelin. Neurons are sometimes called nerve cells, though this term is technically imprecise since many neurons do not form nerves. Nerves are part of the peripheral nervous system. Afferent nerves convey sensory signals to the central nervous system, for example from skin or organs, while efferent nerves conduct stimulatory signals from the central nervous system to the muscles and glands. Afferent and efferent fibers are often arranged together, forming mixed nerves. These signals, sometimes called nerve impulses, are also known as action potentials: rapidly traveling electrical waves, which begin typically in the cell body of a neuron and propagate rapidly down the axon to its tip or "terminus." The signals cross over from the terminus to the adjacent neuron through a gap called the synapse.

Clinical importance

Damage to nerves can be caused by physical injury, swelling (e.g. carpal tunnel syndrome), autoimmune diseases (e.g. Guillain-Barré syndrome), diabetes, or failure of the blood vessels surrounding the nerve. Pinched nerves occur when pressure is placed on a nerve, usually from swelling due to an injury or pregnancy. Nerve damage or pinched nerves are usually accompanied by pain, numbness, weakness, or paralysis. Patients may feel these symptoms in areas far from the actual site of damage, a phenonmenon called referred pain. Referred pain occurs because when a nerve is damaged, signalling is defective from all parts of the area which the nerve receives input, not just the site of the damage.

Stimulus Response Model

The stimulus-response model describes a statistical unit as making a quantitative response to a quantitative stimulus administered by the researcher. The object of this kind of research is to establish a mathematical function that describes the relation f between the stimulus x and the expected value (or other measure of location) of the response Y: :

E(Y) = f(x)

The most common form assumed for such functions is linear, thus we expect to see a relationship like :

E(Y) = \alpha + \beta x.

Statistical theory for linear models has been well developed for more than fifty years, and a standard form of analysis called linear regression has been developed. category:psychology category:Scientific modeling

Stress (medicine)

Stress (roughly the opposite of relaxation) is a medical term for a wide range of strong external stimuli, both physiological and psychological, which can cause a physiological response called the general adaptation syndrome, first described in 1936 by Hans Selye in the journal Nature.

Selye's work

Selye was able to separate the physical effects of stress from other physical symptoms suffered by patients through his research. He observed that patients suffered physical effects not caused directly by their disease or by their medical condition. Selye described the general adaptation syndrome as having three stages:
- alarm reaction, where the body detects the external stimulus
- adaptation, where the body engages defensive countermeasures against the stressor
- exhaustion, where the body begins to run out of defenses Stress includes eustress ("positive stress") and distress ("negative stress"), roughly meaning challenge and overload. Both types may be the result of negative or positive events. If one's relative dies and he/she wins the lottery, one does not cancel the other — both are stressful events. Eustress is essential to life, like exercise to a muscle, but distress can cause disease. (Note that what causes distress for one person may cause eustress for another, depending upon each individual's life perception.) When the word stress is used alone, typically it is referring to distress. Stress can directly and indirectly contribute to general or specific disorders of body and mind. Stress can have a major impact on the physical functioning of the human body. Such stress raises the level of adrenaline and corticosterone in the body, which in turn increases the heart rate, respiration, and blood pressure and puts more physical stress on bodily organs. Long-term stress can be a contributing factor in heart disease, high blood pressure, stroke and other illnesses. The Japanese phenomenon of karoshi, or death from overwork, is believed to be due to heart attack and stroke caused by high levels of stress. The link between emotions and physical health is further supported by this paragraph from James A. Duke's The Green Pharmacy Herbal Handbook about the research of Dean Ornish, M.D.[http://www.mothernature.com/Library/Bookshelf/Books/41/63.cfm]: :Dr. Ornish tells about a group of rabbits that added an unexpected tidbit to the research on heart disease. Kept in a laboratory under research conditions, the rabbits were genetically similar, and all received the same food and got the same amount of exercise, yet one group had 60 percent fewer heart attacks than the others. What was the difference? It turned out that the healthier rabbits were the ones kept in the lower cages, and the short person who fed the rabbits could reach the lower animals and pet them when feeding them. Love, it seems, is a life preserver.

Stressors

Any factor that causes stress is called a stressor. There are two kinds of stressors: processive stressors and systemic stressors. Processive stressors are elements in the environment perceived by the organism as potential dangers. These do not cause damage directly, but are processed in the cerebral cortex. The processed information is then sent via the limbic system in the hypothalamus, where they activate the supreme centers of the autonomic system. This results in the fight-or-flight (or sympathetico-adrenal) response. Systemic stressors cause a disturbance in the organism's homeostasis and the tissue necrosis, hypotension or hypoxia. Often both types of stressors occur simultaneously. They are usually accompanied by pain and/or intensive emotions.

Coping with stress

A given situation causes eustress in one person and distress in the other. This is so because of physiological differences, and because everyone has learned different ways to react and adapt to stress. Currently, many seminars are available for people to develop better habits of stress management. Other approaches include The Alexander Technique, Shiatsu, T'ai Chi Ch'uan, yoga and meditation. For example, when Selye reviewed the physiological changes measured in practitioners of transcendental meditation, he concluded that they were the opposites of the body's reaction to stress, and that the therapeutic effect was clearest in conditions caused by a wrong way to adapt and react to stress in daily life. Finally, serenity is a disposition free or mostly free from the effects of stress, and in some cultures it is considered a state that can be cultivated by various forms of training.

Neurochemistry and physiology

The general neurochemistry of the general adaptation syndrome is now believed to be well understood, although much remains to be discovered about how this system interacts with others in the brain and elsewhere in the body. The body reacts to stress first by releasing catecholamine hormones, epinephrine and norepinephrine, and glucocorticoid hormones, cortisol and cortisone. The hypothalamic-pituitary-adrenal (HPA) axis is a major part of the neuroendocrine system, involving the interactions of the hypothalamus, the pituitary gland and the adrenal glands. The HPA axis is believed to play a primary role in the body's reactions to stress, by balancing hormone releases from the adrenaline-producing adrenal medulla and from the corticosteroid producing adrenal cortex.

Folklore of stress

About the time of Selye's work, the gradual realization dawned that age-old if sometimes ill-defined concepts such as worry/anxiety, conflict, tiredness, frustration, distress, overwork, pre-menstrual tension, over-focusing, confusion, mourning and fear could all come together in a general broadening of the meaning of the term stress. The popular use of the term in modern folklore expanded rapidly, spawning an industry of self-help, personal counselling, and sometimes quackery. The use of the term stress in serious recognized cases such as those of post-traumatic stress disorder and psychosomatic illness has scarcely helped clear analysis of the generalized 'stress' phenomenon. Nonetheless, some varieties of stress from negative life events, or distress, and from positive life events, or eustress, can clearly have a serious physical impact distinct from the troubles of what psychotherapists call "the worried well"

External links

- [http://www.sensemassage.co.uk/test On-Line Stress Test]
- [http://www.stress-reduction-techniques.com Stress Reduction Techniques]
- [http://www.healthdiaries.com/news/mentalhealth/archives/stress/ Stress News]
- [http://salmon.psy.plym.ac.uk/year1/stressho.htm Stress]
- [http://web4health.info/en/answers/somatic-menu.htm Stress and psychosomatic symptoms]
- [http://www.ericdigests.org/1998-2/stress.htm Stress in the Work Place]
- [http://www.ericdigests.org/2003-4/stress.html Stress and Young Children.]
- [http://www.ericdigests.org/pre-928/stress.htm Stress Management for the Learning Disabled]
- [http://www.stress-anxiety-depression.org Stress Anxiety and Depression Articles]
- [http://www.ericdigests.org/pre-927/stress.htm Understanding and Managing Stress in the Academic World]
- [http://www.ericdigests.org/pre-926/stress.htm Student Stress: Effects and Solutions]
- [http://www.ericdigests.org/1999-1/stress.html Promoting Stress Management: The Role of Comprehensive School Health Programs]
- [http://www.helpguide.org/mental/stress_signs.htm Stress: Signs and Symptoms, Causes and Effects]
- [http://www.helpguide.org/mental/stress_management_relief_coping.htm Stress Management and Prevention at Work and at Home]
- [http://www.helpguide.org/mental/stress_relief_meditation_yoga_relaxation.htm Stress Relief: Meditation, Yoga, and Other Relaxation Techniques]
- [http://www.isracast.com/tech_news/101005_tech.htm Blood test can discover chronic stress] - A web article
- [http://www.burnin.nl Stress & Burnout] Category:Psychiatry

Habituation

Habituation is an example of non-associative learning in which there is a progressive diminution of behavioral response probability with repetition of a stimulus. It is another form of integration. An animal first responds to a sensory stimulus, but if it is neither rewarding nor harmful the animal learns to suppress its response through repeated encounters. One example of this can be seen in small song birds - if a stuffed owl (or similar predator) is introduced into the cage, the birds react to it as though it were a real predator, but soon realise that it is not and so become habituated to it. If another stuffed owl is introduced (or the same one removed and re-introduced), the birds react to it as though it were a predator, showing that it is only a very specific stimulus that is being ignored (namely, one particular unmoving owl in one place). This learned suppression of response is habituation. However, not all habituation is conscious like this - for example, a short amount of time after dressing, the stimulus the weight of clothes creates is 'ignored' by the nervous system and we become unaware of it. In this way, habituation is used to ignore any continual stimulus, as changes in stimulus level are normally far more important than absolute levels of stimulation. Negative feedback from the brain to peripheral sensory organs inhibits the transmission of the stimulus at the source of the stimulus. This 'learning' is a fundamental or basic process of biological systems and does not require conscious motivation or awareness to occur. Indeed, without habituation we would be unable to distinguish meaningful information from the background, unchanging information. Habituation is stimulus specific. It does not cause a general decline in responsiveness. It functions like an average weighted history wavelet interference filter reducing the responsiveness of the organism to a particular stimulus. Frequently one can see opponent processes after the stimulus is removed. Habituation is connected to associational reciprocal inhibition phenomenon, opponent process, motion after effect, color constancy, size constancy, and negative image after effect. Habituation is frequently used in testing psychological phenomenon. Both infants and adults look less and less as a result of consistent exposure to a particular stimulus. The amount of time spent looking to a presented alternate stimulus (after habituation to the initial stimulus) is indicative of the strength of the remembered percept of the previous stimulus.

External links

- [http://www.usabilityfirst.com/glossary/main.cgi?function=display_term&term_id=913 Definition at UsabilityFirst] Category:Cognitive science Category:Learning Category:Educational technology

Withdrawal

:For other meanings, see Withdrawal (disambiguation). When an addictive behavior is stopped or an addictive substance is withdrawn from use, withdrawal symptoms almost always follow. Depending on the behavior or substance, these symptoms can appear within a few hours (nicotine) or over a few days or weeks (alcohol, or most behavioral addictions). (Note that the following descriptions apply to both substances and behaviors.) Symptoms themselves vary significantly from addiction to addiction, but there are some commonalities. Withdrawal from addictive substances is typically followed by anxiety and craving, while behavioral withdrawal is marked by a need to continue the behavior despite reason or logic. Withdrawal symptoms may vary from individual to individual for the same substance. Some people are able to quit smoking "cold turkey" (i.e., immediately, without any tapering off), while others may never find success despite repeated efforts. The length of time and the degree to which an addict has been involved with a substance are also indicators of the severity of withdrawal. Withdrawal is a more serious medical issue for some substances than for others. While nicotine withdrawal, for instance, is usually managed without medical intervention, attempting to give up a benzodiazepine or alcohol dependency can result in seizures if not carried out properly. One of the primary agents in withdrawal is the brain chemical dopamine. When humans engage in a pleasurable activity, one physiological reaction is the release of dopamine in the brain's pleasure center. Addictive substances such as nicotine and cocaine mimic the class of brain chemicals known as endorphins, which regulate the release of dopamine. When the effect of the drug wears off and the dopamine level falls, the user experiences the reduced level as a depressed mood, and will re-use in order to re-establish a "high." An interesting side-note is that abstention from some substances that are generally considered highly addictive may not result in withdrawal. There exist documented cases of soldiers returning from Vietnam with heroin addictions. Once home, with the pressure of war behind them, they were able to leave the heroin behind, as well (see Rat Park for experiments on rats showing the same results). It is thought that the severity or otherwise of withdrawal is related to the person's preconceptions about withdrawal. In other words, people can prepare to withdraw by developing a rational set of beliefs about what they are likely to experience. Self-help materials are available for this purpose. Concerns over withdrawal are not limited to substances or activities normally considered addictive. Persons who require antidepressants, for instance, are not addicted to them in the technical sense, yet abrupt, unmonitored withdrawal from such medications can cause withdrawal symptoms that have been reported by many patients to be worse than those from opiates such as heroin or narcotic painkillers. The drugs Effexor (venlafaxine) and Paxil (paroxetine), both of which have relatively short half-lives in the body, are the most likely of the antidepressants to cause withdrawals, but other antidepressants can, as well. Prozac (fluoxetine), with a half-life from 2 days following a single dose to approximately 9 days for the active metabolite after multiple doses, is the least-likely of the SSRIs and combination-serotonin-and-norepinephrine-acting antidepressants SNRIs to cause withdrawal symptoms. This long half-life enabled Prozac to also be released as a formulation that can be taken once a week, Prozac Weekly. Many substances can also cause rebound effects (significant return of the original symptom in absence of the original cause) when discontinued, regardless of their tendency to cause other withdrawal symptoms. Rebound depression is common among users of any antidepressant who stop the drug abruptly, whose states are sometimes worse than the original before taking medication. This is somewhat similar (though generally less intense and more drawn out) than the 'crash' users of Ecstacy, amphetamines, and other stimulants experience. Occasionally light users of opiates that would otherwise not experience much in the way of withdrawals will notice some rebound depression as well. Extended use of drugs that increase the amount of serotonin or other neurotransmitters in the brain can cause some receptors to 'turn off' temporarily or become desensitized, so, when the amount of the neurotransmitter available in the synapse returns to an otherwise normal state, there are fewer receptors to attach to, causing feelings of depression until the brain re-adjusts. Other drugs that commonly cause rebound are:
- Nasal decongestants, such as Afrin (oxymetazoline) and Otrivin (xylometazoline), which can cause rebound congestion if used for more than a few days
- Many analgesics including Advil, Motrin (ibuprofen), Aspirin (aspirin), Tylenol (acetaminophen or paracetamol), and some prescription but non-narcotic painkillers, which can cause rebound headaches when taken for extended periods of time. With these drugs, the only way to relieve the rebound symptoms is to stop the medication causing them and ride through the symptoms for a few days; if the original cause for the symptoms is no longer present, the rebound effects will go away on their own. As well, many drugs are just not safe to abruptly stop without the advice of a physician, if the condition they are being used to treat is potentially dangerous and very likely to return when medication is stopped, such as drugs for epilepsy, hypertension, diabetes, asthma, and heart conditions. To be safe, consult a doctor before discontinuing any prescription medication, unless otherwise directed, or the medication is taken only occasionally as needed. See also:
- Chemical dependency
- Drug tolerance Category:Addiction

Hypoadrenia

Hypoadrenia is a term for a hypothesised condition of the adrenal glands. The terms adrenal exhaustion or adrenal fatigue are often used (and connected to hypoadrenia) by complementary and alternative therapists, but are not formal medical terms. The adrenal glands are part of the body's mechanism for short term stress response and management, the hormone adrenaline (also known as epinephrine) for which they are named being the famous fight or flight chemical released in stressful situations. Along with the thyroid gland they are also part of the body's metabolic energy regulation and control system, and thus control to an extent the energy available to body systems. It is hypothesised and widely accepted by some (but not formally within the clinical profession) that under conditions of long term stress, the adrenal glands can become less responsive to circumstance, or maladapted, and cease to function optimally, leading to a wide (but slightly vague) range of fatigue and stress related conditions including a greater likelihood of psychological conditions such as depression and possibly certain other mood disorders.

Biological background

Main article: Stress: neurochemistry and physiology Biologically, long term stress is a modern phenomenon in the human environment (in evolutionary terms through most of human and mammalian history, stress was a reaction to a point incident, rather than a continuing way of life). As a result, the human body and its internal regulatory mechanisms are poorly adapted to handling many aspects of the types of stress found in civilized cultures. They evolved, so to speak, to react to predator attacks, rather than (for example) constant belittlement, decades long abuse, high risk hobbies, pressure to succeed, or existential and religious inspired worries about ones life and future. Organs such as the brain, the hormonal systems, the sympathetic and parasympathetic systems, and the various glands affected by all these, which were not evolved for, or designed to handle and respond optimally to, constant stimulation may therefore, under modern social conditions, become constantly or abnormally stimulated. Other organs which form part of the whole, such as the nervous and musculoskeletal system, are also made to work for decades under different (and comparatively abnormal) conditions than existed throughout the rest of human evolution. Under certain conditions of long term stress, problematic psychological symptoms can arise. Most other bodily systems, faced with stress of a kind they are not designed to handle, may maladapt or misfunction or cease to work as intended. It is hypothesised, biologically plausible, but not clinically proven, that under certain long term stress and physical conditions, that possibly the bodys stress management systems cease to regulate stress and stress related body systems and hormones appropriately, and instead become adapted to continual over stimulation in various inappropriate ways which can lead to the symptoms described. However this last aspect - medically at least - is strictly hypothetical, and by no means universally accepted.

Symptoms

Adrenal exhaustion involves a depletion of energy reserves and a loss of resilience. Symptomatic signs of adrenal exhaustion are said to be as diverse as fatigue, nervousness, anxiety, severe PMS, depression, brain fog, carbohydrate cravings, allergies, muscular pain and tenderness, joint pain and irritable bowel syndrome.

Clinical views on hypoadrenia

:"Adrenal exhaustion" and "adrenal fatigue" are popular diagnoses among alternative medicine practitioners but are not recognized in conventional medicine. They are often made by people not qualified by medical training (including nutritionists, chiropractors, massage therapists and health food store clerks) and are unlikely to be valid. Symptoms of adrenal exhaustion are usually vague and non-specific - fatigue, lack of energy, depression, weight problems, and insomnia. It is conceivable that very severe stress – resulting from a prolonged illness, for example – could lead to an adrenal imbalance, but I’m not sure that there is any physiological basis for the notion that everyday stress can ever "exhaust" the adrenals. Some treatments recommended for this questionable condition usually are innocuous – rest, stress reduction, a healthy diet, and vitamin/mineral supplements. Others are not, especially adrenal glandular products. [http://www.drweil.com/u/QA/QA354425/]

Alternative therapy views on hypoadrenia and adrenal exhaustion

Quotes

[http://thyroid.about.com/cs/endocrinology/a/adrenalfatigue_2.htm Thyroid.about.com]: :"We live in a society that runs on stimulation -- whether it's coffee, or violence on television -- things that make us live on that edge. So while there are some excellent herbs and essential oils for adrenal support, people need to take care not to try these products along with other stimulants. When you're trying to tone your adrenals, you don't want to drink caffeine, or watch horror movies or violent news stories, for example. Instead of the simulating effect of aerobics, do something more calming, like yoga or tai chi. It's almost as if you need to train your body to run more on internal energy than outside energy and stimulation."

Irritation

Irritation, in biology and physiology, is a state of over-excitation or hyper-reactivity. A stimulus or agent which induces the state of irritation is an irritant. Irritants are typically thought of as chemical agents (for example phenol and capsaicin) but mechanical, thermal (heat) and radiative stimuli (for example ultraviolet light or ionising radiations) can also cause irritation.

Irritation in Organisms

In higher organisms the allergic response may be cause of irritation. An allergen is defined distinctly from an irritant, however, as allergy requires a specific interaction with the immune system and is thus dependant on the (possibly unique) sensitivity of the organism involved while an irritant, classically, acts in a non-specific manner. In humans, it is a mild form of suffering, often with anger about this, in particular, if applicable, anger at the person who caused it. This can also be oneself, e.g. when forgetting something or doing something stupid. It is a form of stress, but conversely, if one is stressed by unrelated matters, mild imperfections can cause more irritation than usual, one is irritable; see also sensitivity (human). In more basic organisms, assigning irritation the status of pain is the perception of the being stimulated - which is not observable although it may be shared (see gate control theory of pain). We can't say that an oyster feels pain, but we can say it does react to something irritating it, to produce something that is useful to us, and not useful to it. Pearls do not attract mates for the oyster, they attract them for us. It seems impossible to find an evolutionary advantage for the ability to produce the pearl, thus it can be explained only as a reaction to an irritation. We can also say that an amoeba avoids a pin we poke it with, but not how much it feels this. Irritation is apparently the only universal sense shared by even single-celled creatures. It is postulated that most such beings also feel pain, but this is a projection - empathy. Some philosophers, notably René Descartes, denied it entirely, even for such higher mammals as dogs or primates like monkeys - to him, intelligence was a pre-requisite to even the feeling of pain.

Mating

Mating is a fascinating example of the complexity that can arise in considering irritation. Males generally pursue females in mating species - females avoid males that they assume are undesirable, or at bad times to bear young. Thus the physical aspects of sexual pursuit may irritate the female, and the pursuit may itself be an irritation. This changes when a desirable male approaches at the right time - at least insofar as the female considers it to be so. So something which is an irritation at one time may serve a purpose, or even be a pleasure, at another. For these reasons mating is very often omitted from any discussion of irritation itself, and indeed prevents problems for discussions of pain and pleasure itself. Mating often involves both - and certainly motherhood also involves a great number of irritations, but with the third party observed advantage of passing on genes - that is, if one accepts that this is of any use.

Stress management

Stress management encompasses techniques intended to equip a person with effective coping mechanisms for dealing with psychological stress. Definition of stress: Stress management defines stress precisely as a person's physiological response to an external stimulus that triggers the "fight-or-flight" reaction. ( Also see General adaptation syndrome) Causes of stress: Many things can trigger the stress reaction, including danger, threat, news, illness, as well as significant changes in one's life such as the death of a loved one. The Homes Rahe Scale is used by psycologyists to [http://www.sensemassage.co.uk/test test stress levels]. life Techniques of stress management include:
- self-understanding (e.g. self-identification as a Type A or as a Type B personality)
- self-management (e.g. becoming better-organized)
- conflict resolution
- positive attitude
- self-talk
- Autogenic training
- breathing
- meditation
- exercise
- diet
- rest
- Stress balls Some techniques of time management may help a person to control stress. For example:
- becoming more organized and reducing the generation of clutter
- setting priorities can help reduce anxiety
- using a "to do" list of tasks that a person needs to complete can give a person a sense of control and accomplishment Effective stress management involves learning to set limits and to say "No" to some demands that others make. Digital Thermometers Since stress activates the body's defense mechanism, blood is frequently drawn away from the extremities and to the torso when a Strees attack occurs. Digital Thermometers (digital because the measure finger temperature) can be used to detect a person's level of stress. Note that the actual temperature is not the most important characteristic, but rather the change in temperature. Using this knowledge has proven useful in designing treatment for prevention and control of Stress attacks. This technique was pioneered by Dr. Claudio Zapata.

Category:Perception

Category:Psychology Category:Neuroscience Category:Philosophy of mind ja:Category:感覚

Gaston Gaudio

Gastón Gaudio (9 de dezembro de 1978, Buenos Aires) é um tenista argentino. Gaston Gaudio(nascido Buenos Aires,Argentina em 1978) é um tenista profissional argentino com o NikName El Gato.Gahou o Roland Garros singulares masculinos em 2004 numa final contra o compatriota Guillermo Coria como resultado entrou para o top 10 do ATP pela rimeira vez. O seu ponto forte é o backhand, que foi elogiado por Guillermo Vilas.

Guillermo Vilas

Titles (8)

Singles (8)

Singles Finalist (8)

- 2000: Stuttgart (lost to Franco Squillari)
- 2001: Vina del Mar (lost to Guillermo Coria)
- 2002: Gstaad (lost to Alex Corretja)
- 2004: Barcelona (lost to Tommy Robredo)
- 2004: Båstad (lost to Mariano Zabaleta)
- 2004: Stuttgart (lost to Guillermo Canas)
- 2004: Kitzbühel (lost to Nicolas Massu)
- 2005: Stuttgart (lost to Rafael Nadal)

Performance timeline

Gaudio, Gaston ja:ガストン・ガウディオ

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Stimulation

Overview

Over-stimulation

See also

Stimulus

See also

Nerve

Clinical importance

See also

Stimulus Response Model

Stress (medicine)

Selye's work

Stressors

Coping with stress

Neurochemistry and physiology

Folklore of stress

See also

Further reading

External links

Habituation

See also

External links

Withdrawal

Hypoadrenia

Biological background

Symptoms

Clinical views on hypoadrenia

Alternative therapy views on hypoadrenia and adrenal exhaustion

Quotes

See also

Irritation

Irritation in Organisms

Mating

See Also

Stress management

See also

Category:Perception

Gaston Gaudio

Guillermo Vilas

Titles (8)

Singles (8)

Singles Finalist (8)

Performance timeline