ABNORMAL DROWSINESS DURING THE DAY - ATTEMPT OF TYPING

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MEIEREWERT, K
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R5 [内科学];
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1002 ; 100201 ;
摘要
Abnormal drowsiness during the day is defined on the basis of three criteria: 1. subjective feeling of increased tiredness, 2. objective observation of attacks of falling asleep, 3. detection of premature falling asleep in the multiple sleep latency test. About 3 to 4 % of the population of modern industrial countries complain of this symptom which very quickly leads to inability to work in numerous occupations [driving instructors, lorry drivers, airline pilots]. In many cases, the symptoms can be eliminated by effective methods of treatment. Early diagnosis and therapy is hence an important task of physicians. Clinically suitable tools and methods of measurement for appraising the phenomena are at present: 1. the multiple sleep latency test (Richardson et al., 1978), 2. the multiple staying awake test (Mitler et al., 1982), 3. the vigilance test according to Quatember and Maly from the Vienna test system. In neurophysiological terms, an attempt is made to differentiate between: REM drowsiness, non-REM drowsiness, hypofunction of the arousal systems of the reticular formation, and hyperfunction and overstimulation of the arousal systems of the reticular formation (overaroused tiredness). Approaches to a clinical typology of abnormal drowsiness are available from two points of departure: 1. Forms of permanent somnolence which are not alleviated but intensified by a brief restorative sleep and resemble the 'oversleep syndrome' of the healthy individual. 2. Attacks of imperative falling asleep in narcoleptic patients. The characteristic of this form of abnormal drowsiness during the day is that in the interval between the attacks of falling asleep patients can take on any healthy person with regard to alertness, reaction capacity and ready wit. After a brief restorative sleep of less than 5 min., they immediately feel fresh, alert and fit again.
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页码:746 / 750
页数:5
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