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
References in periodicals archive ?
For the electroencephalogram, the filter parameters were chosen by the band limit of the basic brain rhythms: alpha, beta, gamma, theta, and delta rhythm [9,10].
Originally released in 1957 and now available to a whole new generation of appreciative listeners, "The Delta Rhythm Boys" (COL-CO-6391, $12.
One quartet at Dillard, the Frederick Hall Quartet, changed its name to Delta Rhythm Boys and continued to perform after the men left the university.

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