Key result
Increases in alpha density during feedback training are proposed to arise from a diminution of constitutional, physiological, and cognitive-attentional factors that block this rhythm.
Why the study?
What are the mechanisms mediating the learned feedback control of human alpha rhythm brain wave activity?
What are the mechanisms mediating the learned feedback control of human alpha rhythm brain wave activity?
Learned control of alpha rhythms via feedback training may be mediated by the reduction of factors that typically block these brain waves.
Multiple factors shape alpha density; leaves open their relative weight in biofeedback efficacy.
The recent attention given to the feedback control of human brain wave activity and the implications of such control prompts a careful analysis of this phenomenon. Particular emphasis is placed on the learned control of the alpha rhythm. A review of possible factors which might influence the density of alpha rhythms led to the differentiation of three general sources of influence: constitutional, physiological, and cognitive-attentional factors. Each of these factors is discussed as a possible mediator of the learned control of the alpha rhythm. The view is advanced that increases in alpha density during feedback training arise from a diminution of those factors which block this rhythm, and some implications of such a view are discussed. Several of the issues raised appear generalizable to the whole question of the operant control of autonomic activity.
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Lynch et al. (1971) conducted a review in Feedback control of human brain wave activity. Feedback training of alpha rhythm was evaluated. Increases in alpha density during feedback training are proposed to arise from a diminution of constitutional, physiological, and cognitive-attentional factors that block this rhythm.
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