alpha rhythm

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alpha rhythm

[′al·fə ‚rith·əm]
(physiology)
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.
References in periodicals archive ?
Brain correlates underlying creative thinking: EEG alpha activity in professional vs.
Mazaheri, "Shaping functional architecture by oscillatory alpha activity: gating by inhibition," Frontiers in Human Neuroscience, vol.
(16.) Ray WJ, Cole HW EEG alpha activity reflects attentional demands and beta activity reflects emotional and cognitive processes.
The alpha activity was decisive, i.e., the brain activity was in the frequency range 8 to 12 hertz.
When these movements provoke fragmentation of sleep architecture, they are associated with K-complexes or with alpha activity (cortical micro-awakenings).
Crabbe and Dishman (2004) conducted a metaanalysis examining EEG responses during and after exercise and concluded that when compared to pre-exercise, alpha activity (absolute power) was greater both during and following exercise, but there was no differences in relative alpha activity.
Modulation of gamma and alpha activity during a working memory task engaging the dorsal or ventral stream.
Analysis of intercentral interactions of brain electrical processes in healthy subjects in a state of relative rest revealed that the average levels of coherence (Rusinov et al., 1987) of symmetrical hemisphere regions independent of EEG type (alpha activity characteristics) and individual asymmetry profiles are characterized by a significant similarity and the presence of an anterior-posterior falling gradient of biopotential association.
Hatfield went on to complete a series of studies to more thoroughly investigate changes in alpha activity as elite marksmen prepared to fire their rifles.
Some authors regard alpha activity attenuation (i.e.
In addition, the unopposed alpha activity led to vasoconstriction, thereby worsening peripheral blood flow, exacerbating diabetic foot problems, promoting erectile dysfunction, and causing fatigue.