| withdrawal reflex | Flexion of ankle, knee, and hip when the foot is painfully stimulated; the crossed extension reflex occurs in association with it. Synonym: defense reflex, nociceptive reflex, withdrawal reflex. (05 Mar 2000) |
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| alcoholic withdrawal tremor | Intention tremor present in the withdrawal period of one of two types: 1) a tremor of greater than 8 Hz, with continuous antagonistic muscle activity, and 2) a tremor of less than 8 Hz, with intermittent spontaneous antagonistic muscle activity. (05 Mar 2000) |
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| alcohol withdrawal | <psychiatry> A clinical syndrome that results from the abstinence of alcohol consumption. Seen in those with habitual long-term or heavy alcohol use history. (27 Sep 1997) |
| alcohol withdrawal delirium | An acute organic mental disorder due to recent cessation or reduction in alcohol consumption with the essential characteristic being delirium. Autonomic hyperactivity - that is, tachycardia, sweating, and elevated blood pressure - is also present. It was formerly called delirium tremens. (12 Dec 1998) |
| CO2-withdrawal seizure test | Utilization of hyperventilation to demonstrate abnormalities in the brain waves or even to precipitate a convulsion. (05 Mar 2000) |
| withdrawal | 1. <psychology> A pathological retreat from interpersonal contact and social involvement, as may occur in schizophrenia, depression or schizoid avoidant and schizotypal personality disorders. 2. <pharmacology> A substance specific organic brain syndrome that follows the cessation of use or reduction in intake of a psychoactive substance that had been regularly used to induce a state of intoxication. (06 Oct 1997) |
| withdrawal symptoms | A group of morbid symptom's, predominantly erethistic, occurring in an addict who is deprived of his accustomed dose of the addicting agent. Synonym: abstinence symptoms. (05 Mar 2000) |
| withdrawal syndrome | <syndrome> The development of a substance-specific syndrome that follows the cessation of, or reduction in, intake of a psychoactive substance that the person previously used regularly; e.g., clinical syndrome of disorientation, perceptual disturbance, and psychomotor agitation following the cessation of chronic use of excessive quantities of alcohol is termed alcohol withdrawal syndrome. The syndrome that develops varies according to the psychoactive substance used. Common symptoms include anxiety, restlessness, irritability, insomnia, and impaired attention. See: abstinence syndrome. (05 Mar 2000) |
| steroid withdrawal syndrome | <syndrome> A condition exhibited by persons who previously had been receiving large therapeutic doses of glucocorticoid hormones for long periods of time; pituitary-adrenocortical insufficiency is manifested, particularly during stress, for as long as a year or more thereafter and varying degrees of emotional disturbance may be exhibited. (05 Mar 2000) |
| substance withdrawal syndrome | <syndrome> Physiological and psychological symptoms associated with withdrawal from the use of a drug after prolonged administration or habituation. The concept includes withdrawal from smoking or drinking, as well as withdrawal from an administered drug. (12 Dec 1998) |
| drug withdrawal | A clinical syndrome of psychological, and, sometimes physical factors that result from the sustained use of a particular drug when the drug is abruptly withdrawn. Symptoms are variable but may include anxiety, nervousness, irritability, sweating, nausea, vomiting, rapid heart rate, rapid breathing and seizures. (27 Sep 1997) |
| thought withdrawal | The delusion that one's thoughts have been removed from one's head resulting in a diminished number of thoughts remaining. (05 Mar 2000) |
| abdominocardiac reflex | Mechanical stimulation (usually distention) of abdominal viscera causing changes (usually a slowing) in the heart rate or the occurrence of extrasystoles. (05 Mar 2000) |
| Abrams' heart reflex | A contraction of the myocardium when the skin of the precordial region is irritated. (05 Mar 2000) |
| accommodation reflex | Increased convexity of the lens, due to contraction of the ciliary muscle and relaxation of the suspensory ligament, to maintain a distinct retinal image. (05 Mar 2000) |
| Achilles reflex | A contraction of the calf muscles when the tendo calcaneus is sharply struck. Synonym: ankle jerk, ankle reflex, tendo Achillis reflex, triceps surae reflex. (05 Mar 2000) |