PARKINSON’S DISEASE

A chronic degenerative disease of the central nervous system, usually occurring between the ages of fifty and seventy. Atrophy takes place primarily in the...

PASSIVE-AGGRESSIVE PERSONALITY

A personality trait disturbance characterized by immaturity and failure to develop an adequate balance between dependence and independence, and between aggressiveness and submissiveness.This failure...

PATHOLOGICAL INTOXICATION

An acute psychotic episode occurring in (1) individuals whose tolerance for alcohol is low due to an unstable personality or epileptic tendencies, and (2)...

PEAK-CLIPPING

Increasing the intelligibility of transmitted speech by “clipping,” or eliminating, high intensity sounds and amplifying the low intensities.Peak-clipping is accomplished by special circuits in...

PELLAGRINOUS PSYCHOSIS

A metabolic disorder produced by a severe deficiency of vitamin B (niacin, nicotinic acid). Deficiencies of thiamine, riboflavin, and ascorbic acid may also be...

PEPTIC ULCER

A craterlike wound in the inner wall of the stomach or duodenum resulting from the corrosive effects of acid-containing digestive juices. Although certain types...

PERPLEXITY STATES

A form of mental confusion in which the patient is assailed with doubt and uncertainty about his own thoughts.Perplexity is one of the more...

PAIN DRIVE

drive directed to the removal of noxious stimulation.This basic drive is activated by special sense organs in the form of free nerve endings embedded...

PAIRED ASSOCIATES LEARNING

A technique for studying learning. Words, syllables, digits, or other items are learned in pairs, and the subject is later tested on his ability...

PARALOGICAL THINKING

False, illogical thinking found particularly in schizophrenic reactionsParalogical thinking may take many forms. A patient who is preoccupied with his own subjective thoughts and...

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