brain wave

/breɪn weɪv/
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Other forms: brain waves

Definitions of brain wave
  1. noun
    (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
    synonyms: brainwave, cortical potential
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    types:
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    alpha rhythm, alpha wave
    the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz
    beta rhythm, beta wave
    the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz
    delta rhythm, delta wave
    the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
    theta rhythm, theta wave
    the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
    type of:
    bioelectricity
    electric phenomena in animals or plants
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