alpha rhythm

(redirected from alpha activity)
Also found in: Dictionary, Thesaurus, Medical.
Related to alpha activity: alpha rhythm

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.
References in periodicals archive ?
Ray WJ, Cole HW EEG alpha activity reflects attentional demands and beta activity reflects emotional and cognitive processes.
A high level of alpha activity counts as a marker of the readiness of the brain to exploit new incoming information.
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.
The revealed features of the alpha activity topography in damage to limbic structures allow us to extend the customary concepts in clinical electroencephalography of the interpretation of EEG interhemispheric asymmetry in conditions of organic brain pathology.
One of the general findings from EEG research in this area has been that an increase in alpha activity, commonly seen as skill level increases, is not simply indicative of cortical deactivation, but is indicative of neural reorganization concomitant with the acquisition of more efficient, task-specific cognitive and motor processes (Nunez, 1995; Smith, McEvoy, & Gevins, 1999).
1982) Bilateral hemispheric alpha activity during visual imagery.
It was expected that, in comparison with the HC individuals, the AC ones would show lower alpha activity while solving creative problems.
Gross alpha and beta activity in bone: For gross alpha activity in bone, there was a significant difference (ANOVA, p < 0.
Tenders are invited for Supply of Stainless Steel (SS) Planchet for Alpha activity determination as per annexure
Measurements along the EEG alpha activity scale show the degree of attentiveness in a person, he explained.