delta rhythm


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delta rhythm

or

delta wave

n
(Physiology) physiol the normal electrical activity of the cerebral cortex during deep sleep, occurring at a frequency of 1 to 4 hertz and detectable with an electroencephalograph. See also brain wave

del′ta rhythm`


n.
a pattern of slow brain waves, less than 6 cycles per second, associated with the deepest phase of slow-wave sleep.
[1935–40]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.delta rhythm - the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
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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