Figure 1.

30-second epoch tracing of polysomnography recorded during REM sleep reveals persistent chin EMG tone during REM sleep, with overt whole-body movements at the end of the epoch. LEOG = Left electrooculogram, REOG = Right electrooculogram, FP1A2 – O2A2 = Electroencephalogram leads, Chin, LFA, RFA = Facial electromyelograms, LLEG = Left leg electromyelogram, RLEG = Right leg electromyelogram, Tflow = thermistor flow monitor, Pflow = pressure flow monitor, THOR = Thoracic piezoelectric band, ABD = Abdominal piezoelectric band.