delta rhythm

American  

noun

Physiology.

1. a pattern of slow brain waves, having a frequency of less than 6 cycles per second as recorded by an electroencephalograph, associated with deep sleep.

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delta rhythm British  

noun

1. 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

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Etymology

Origin of delta rhythm

First recorded in 1935–40

Example Sentences

A group called the Delta Rhythm ‘N’ Bayous Alliance is promoting the idea of developing music-themed tourist attractions between Greenville, Mississippi, and Pine Bluff, Arkansas.

From Seattle Times