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. 2014 Sep 12;9(9):e106969. doi: 10.1371/journal.pone.0106969

Figure 2. Polygraphic recordings used in this study.

Figure 2

(A) Polygraphic system including EEG, EMG, and LOC in a sound-proof recording gage. (B) Typical EEG, EMG, and LOC of wake, REM sleep, and NREM sleep. EEG, electroencephalograph; EMG, electromyography; LOC, locomotor; NREM, nonrapid eye movement; REM, rapid eye movement.