sleep spindles

regular sinusoidal electroencephalographic oscillations that rise and fall in amplitude in the shape of symmetrical hairpins or spindles during Stage 2 NREM sleep (see sleep stages). Spindles have a frequency of about 15 Hz and are believed to indicate a state of light sleep. They are often seen with K complexes.

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Psychology term of the day

November 17th 2024

eye-movement desensitization and reprocessing (EMDR)

Sorry, "eye-movement-desensitization-and-reprocessing-emdr" is not in the Dictionary of Psychology. Please report to APA if you believe this is an error.