Ponto Geniculo Occipital spike is characteristic of ------- sleep: (A) Stage 1 NREM, (B) Stage 2 NREM, (C) Stage 4 NREM, (D) REM
Answer is D. PGO waves are prominent phasic bioelectrical , closely related to rapid eye , that occur in or during Ref: Principles and practice of sleep medicine, 6e, 2017.