Interpreting EEG alpha activity

Bazanova, O. and Vernon, D. (2014) Interpreting EEG alpha activity. Neuroscience and Biobehavioral Reviews, 44. pp. 94-110. ISSN 0149-7634.

Vernon_2015_Interpreting_EEG_alpha_activity.pdf - Accepted Version

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Exploring EEG alpha oscillations has generated considerable interest, in particular with regards to the role they play in cognitive, psychomotor, psycho-emotional and physiological aspects of human life. However, there is no clearly agreed upon definition of what constitutes ‘alpha activity’ or which of the many indices should be used to characterize it.

To address these issues this review attempts to delineate EEG alpha-activity, its physical, molecular and morphological nature, and examine the following indices: (1) the individual alpha peak frequency; (2) activation magnitude, as measured by alpha amplitude suppression across the individual alpha bandwidth in response to eyes opening, and (3) alpha “auto-rhythmicity” indices: which include intra-spindle amplitude variability, spindle length and steepness.

Throughout, the article offers a number of suggestions regarding the mechanism(s) of alpha activity related to inter and intra-individual variability. In addition, it provides some insights into the various psychophysiological indices of alpha activity and highlights their role in optimal functioning and behavior.

Item Type: Article
Uncontrolled Keywords: Individual alpha peak frequency; Individual alpha bandwidth; Alpha amplitude suppression; Spindle-form segments length; Intra-spindle amplitude variability
Subjects: R Medicine > RC Internal medicine > RC0346 Neurology. Diseases of the nervous system > RC0386 Electroencephalography
Divisions: pre Nov-2014 > Faculty of Social and Applied Sciences > Applied Social Sciences
Depositing User: Dr David Vernon
Date Deposited: 03 Nov 2015 17:20
Last Modified: 28 Feb 2016 00:46

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Last edited: 29/06/2016 12:23:00