Interpreting EEG alpha activity
Bazanova, O. and Vernon, D. 2014. Interpreting EEG alpha activity. Neuroscience and Biobehavioral Reviews. 44, pp. 94-110. https://doi.org/10.1016/j.neubiorev.2013.05.007
|Authors||Bazanova, O. and Vernon, D.|
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.
|Keywords||Individual alpha peak frequency; Individual alpha bandwidth; Alpha amplitude suppression; Spindle-form segments length; Intra-spindle amplitude variability|
|Journal||Neuroscience and Biobehavioral Reviews|
|Journal citation||44, pp. 94-110|
|Digital Object Identifier (DOI)||https://doi.org/10.1016/j.neubiorev.2013.05.007|
|Publication process dates|
|Deposited||03 Nov 2015|
|Accepted||03 May 2013|
|Accepted author manuscript|
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