Abstract
Clinical efficiency of Modafinil was clearly demonstrated in narcoleptic patients but only a few electrophysiological studies were carried out to confirm these observations. Since Modafinil did not change the propensy to fall asleep, the aim of this work was to study maintenance of wakefulness and performance levels in treated narcoleptic patients. Of the 16 treated patients, 12 responded as expected to Modafinil. These 12 patients were studied. After a one night polysomnography, electrophysiological tests included: baseline spectral analysis, maintenance of wakefulness tests carried out respectively eyes open in diffused light and eyes closed in darkness during which sleep latency, duration of test and changes in the theta/alpha ratio were measured. Psychometric performances were evaluated using verbal or non verbal tests: visual and auditory reaction time tests. Trail Making Test, Stroop, verbal Fluency and WAIS-R. Modafinil improved the ability of narcoleptic patients to remain awake only when the situation or the environmental conditions were favorable. Some psychometric performances also trended towards on improvement.
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