Case presentation A 14-year-old girl presented with excessive daytime sleepiness accompanied by abnormal behavior during sleep. The abnormal sleep behavior was characterized by a struggle in waking up, rolling up of the eyes, limb twitching, and going into a twilight state with an unsteady gait for up to half an hour after waking up.
General physical examination: Height – 179 cm; weight – 70 kg; BMI – 21.8 kg/m 2 Medical history Intermittent excessive daytime sleepiness for the last two years Polysomnography (PSG) and continuous polysomnographic latency testing (MSLT): Sleep latency – 56.5 min; rapid eye movement (REM) latency – 8.0 min; sleep efficiency – 83.4%; abnormal findings in sleep stages — N1% sleep period time (SPT) of 8.2%, N2% SPT of 63.7%, N3% SPT of 3.2%, and REM% SPT of 24.9%; periodic leg movement during sleep (PLMS) index of 1.4/h. Apnea/hypopnea index – 0.9/h; average…
