Preliminary observations on the effects of sleep time in a sleep restriction paradigm Preliminary observations on the effects of sleep time in a sleep restriction paradigm Download Normal hypocretin-1 (orexin-A) cerebrospinal fluid level in a previously reported case of severe, life-long insomnia with motor hyperactivity Prevalence of patent foramen ovale in subjects with obstructive sleep apnea: a transcranial Doppler ultrasound study