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1. a wave pattern in the encephalogram in the frequency band of 8-13 Hz;
2. the posterior dominant 8-13 Hz rhythm in the awake, relaxed person with closed eyes, that attenuates with eye opening.
Farlex Partner Medical Dictionary © Farlex 2012
An electrical oscillation occurring in the human brain at a frequency of about 8 to 13 hertz as recorded on an electroencephalogram, associated with a state of relaxed wakefulness. Also called alpha rhythm.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
alpha wave“Superficial” brain waves which have a frequency of 8 to 12 cycles/second (Hz), with an amplitude of 50 µV; alpha waves are normally present in the occipital and parietal lobes, and are intentionally induced in Silva mind control, an alternative form of psychological therapy, as Silva believed that the alpha pattern is typical of daydreaming.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
alpha waveNeurology A superficial brain wave with a frequency of 8–13 cycles/sec–Hz, an amplitude of 50 µV, which is normally seen by EEG in the occipital and parietal lobes. See Alpha rhythm, Brain waves, Silva mind control. Cf Mantra, Meditation, Theta waves, Yoga.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
alpha waveThe most prominent waveform found in the ELECTROENCEPHALOGRAM-the recording electrical activity of the brain. It is characterized by 8 to 12 oscillations per second when the subject is at rest.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Rhythmic oscillation in electrical potential occurring in the cortex of the human brain when awake and at rest. The rate of oscillation is 8-13 Hz. Syn. alpha rhythm. See resting membrane potential.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann