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theta rhythm

   Also found in: Medical, Encyclopedia, Wikipedia 0.01 sec.
theta rhythm
n.
A waveform on an electroencephalogram having a frequency of 4 to 8 hertz, recorded chiefly in the hippocampus of carnivorous mammals when they are alert or aroused. Also called theta wave.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.theta rhythm - the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude
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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