sleep spindles

sleep spindles
bursts of activity at frequencies of about 14 per second, seen on the electroencephalogram in light or early sleep.

Medical dictionary. 2011.

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  • stage 2 nightmare —    The term stage 2 nightmare was introduced in or shortly before 1968 by the American sleep researchers Charles Fisher (1908 1988), Joseph V Byrne, and Adele Edwards It refers to a type of night terror which may occur during the stage of light… …   Dictionary of Hallucinations

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