Variations of heart rate during sleep as a function of the sleep cycle.
D000704:Analysis of Variance; D004562:Electrocardiography; D004569:Electroencephalography; D004585:Electrooculography; D006339:Heart Rate; D006801:Humans; D008950:MMPI; D012890:Sleep; D012894:Sleep Stages; D012895:Sleep, REM