The EEG recorded shown below is normally recordable during which stage of sleep?: (A) Stage I, (B) Stage II, (C) Stage III, (D) Stage IV
Answer is B. Following are seen in Stage II of NREM sleep: 1. Sleep spindles( burst of regular waves, 13- 15 Hz , 50 micro volt) 2. K complexes - High voltage spikes, seen intermittently