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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

December 22nd 2024

nontraditional education

nontraditional education

1. an educational plan that does not conform to the accepted or customary ideas of an ordinary educational system and that may include innovative approaches to teaching, curriculum, grading, or degree requirements.

2. an educational plan that allows an individual to gain credentials without going through the usual channels.