title: Precise conservation of NREM period 1 (NREMP1) delta across naps and nocturnal sleep: implications for REM latency and NREM/REM alternation.
abstract: The delta integrated amplitude (DIA) in nonrapid eye movement period 1 (NREMP1) of daytime naps was precisely subtracted from the NREMP1s of ensuing nocturnal sleep, indicating that the brain can retain a record of DIA expressed in sleep episodes initiated 12.5 and 8.5 hours before nocturnal sleep onset. The DIA subtraction was primarily accomplished by reduced NREMP1 duration [earlier rapid eye movement (REM) onset], suggesting that the timing of REM period 1 (REMP1) onset is controlled by delta need. This result is consistent with the hypothesis that REM sleep occurs when a stimulus for NREM has been partially depleted.
authors.affiliation: Northern California System of Veterans Administration Clinics, University of California, Davis 95616.
authors.forename: I
authors.initials: I
authors.lastname: Feinberg
authors.forename: T
authors.initials: T
authors.lastname: Maloney
authors.forename: J D
authors.initials: JD
authors.lastname: March
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology*; D003700:Delta Rhythm; D005260:Female; D006706:Homeostasis; D006801:Humans; D008297:Male; D017286:Polysomnography / Q000295:instrumentation; D011930:Reaction Time / Q000502:physiology*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D012894:Sleep Stages / Q000502:physiology*; D012895:Sleep, REM / Q000502:physiology