MCAT Question of the Day
    •

    Q:

    		 During which stage of sleep do spindle waves occur?
    		 

    A

    		 Stage 4, as evidenced by the presence of alpha waves.

    B

    		 Stage 2, as evidenced by the presence of muscle twitching.

    C

    		 Stage 3, as evidenced by the presence of Theta waves.

    D

    		 Stage 1, as evidenced by the presence of REM.



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