Sleep and EEG
A. Alpha spindles occur in stage 1
B. K complexes occur in stage 2,3 and 4
C. REM is characterised by desynchronisation with faster frequencies
D. Stage 4 is characterised by sleep spindles of fast activity
E. Frequent vertex sharp waves occur in stage 2
Answer: D. Stage 4 is characterised by sleep spindles of fast activity
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