theta rhythm

Definitions of theta rhythm
  1. noun
    the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
    synonyms: theta wave
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    type of:
    brain wave, brainwave, cortical potential
    (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph
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