WordReference Random House Unabridged Dictionary of American English © 2025
al′pha rhythm′, 
  1. Physiologya pattern of slow brain waves (al′pha waves′) in normal persons at rest with closed eyes, thought by some to be associated with an alert but daydreaming mind.
  • earlier alpha waves, translation of German Alphawellen, term used by their discoverer, German physician Hans Berger (1873–1941) 1935–40

Collins Concise English Dictionary © HarperCollins Publishers::
alpha rhythm, alpha wave
  1. the normal bursts of electrical activity from the cerebral cortex of a drowsy or inactive person, occurring at a frequency of 8 to 12 hertz and detectable with an electroencephalograph
    See also brain wave
'alpha rhythm' also found in these entries (note: many are not synonyms or translations):
beta rhythm - biorhythm - brain wave - orthodox sleep

Forum discussions with the word(s) "alpha rhythm" in the title:


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