Researchers from the HSE Centre for Cognition & Decision Making and the (Institute of Problems of Mechanical Engineering, Russian Academy of Sciences conducted a series of experiments in which participants learned to increase through neurofeedback the amount of Alpha waves produced by their brains. The scientists wanted to find out which characteristics of the Alpha bursts participants actually learned to control through the training- the amplitude, the duration of the spindles or their frequency. The EEG analysis showed that it was the frequency of occurrence of Alpha and hence the frequency of inducing an alpha state that increased as a result of the neurofeedback training. This discovery may contribute to non-pharmacological methods for treating epilepsy, attention-deficit/hyperactivity disorder and depression. The research results were published in the journal Scientific Reports.
Original article: Alexei Ossadtchi et al, Neurofeedback learning modifies the incidence rate of alpha spindles, but not their duration and amplitude, Scientific Reports (2017). DOI: 10.1038/s41598-017-04012-0