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See beta wave.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physiology) physiol the normal electrical activity of the cerebral cortex, occurring at a frequency of 13 to 30 hertz and detectable with an electroencephalograph. See also brain wave
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a pattern of high-frequency brain waves (beta waves) observed in normal persons upon sensory stimulation, esp. with light, or when they are engaging in purposeful mental activity.
[1935–40; translation of German Betawellen; see alpha rhythm]
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|Noun||1.||beta rhythm - the normal brainwave in the encephalogram of a person who is awake and alert; occurs with a frequency between 12 and 30 hertz|
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