HyperDic: alpha_rhythm

English > 1 sense of the expression *alpha rhythm*:
NOUN	phenomenon	alpha rhythm, alpha wave	the normal brainwave in the electroencephalogram of a person who is awake but relaxed

English > *alpha rhythm*: 1 sense > noun 1, phenomenon
Meaning	The normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz.
Synonym	alpha wave
Broader	brainwave, brain wave, cortical potential	(neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph