Abstract
Alpha is a prominent rhythm occurring between 8 and 13 Hz in brain signals that is often linked to a relaxed mental state. Some studies have shown that individuals can learn to control their own alpha rhythm if provided with a contingent feedback. However, investigations till date in alpha neurofeedback have provided contrasting views regarding the enhancement of alpha power. In this review, we discuss various aspects of this controversy and highlight some issues with past approaches of neurofeedback driven alpha enhancement. In particular, we discuss possible modifications in future investigations which would address some of the concerns.
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