alpha rhythm(redirected from alpha activity)
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Related to alpha activity: alpha rhythm
alpha rhythm[′al·fə ‚rith·əm]
An electric current from the occipital region of the brain cortex having a pulse frequency of 8 to 13 per second; associated with a relaxed state in normal human adults.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.