Twenty epileptics and 11 healthy controls were investigated with polysomnography. Epileptics with interictal discharges had significantly longer total recording time and longer REM latency than the controls (P<0.05). Epileptics had a more fragmentized sleep than controls. Sleep efficiency of patients with interictal discharges was lower than that of patients without them (P<0.05). Among the patients with interictal discharges, those with partial seizures had a significantly higher arousal number than those with generalized seizures (P<0.05). The number of NREM stage shifts in patients with partial seizures tended to be higher than in those with generalized seizures.
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