Alpha neurofeedback improves the maintaining ability of alpha activity

Area of Science:

• Neuroscience
• Cognitive Science
• Biofeedback

Background:

• Electroencephalography (EEG) measures brain electrical activity.
• Alpha-activity is a prominent EEG rhythm associated with relaxed wakefulness.
• Neurofeedback (NF) is a training technique that uses real-time EEG monitoring.

Purpose of the Study:

• To investigate the effects of alpha-neurofeedback (ANF) on electroencephalographic alpha-activity.
• To determine if ANF training enhances alpha-amplitude or the self-maintenance of alpha-activity.
• To assess the persistence of training effects across sessions.

Main Methods:

• Participants underwent ANF sessions comprising eye-opening and training periods.
• EEG data, specifically alpha amplitudes, were recorded during ANF.
• Sessions were divided into bins to analyze temporal changes in alpha-activity.
• Correlation analysis was used to assess the relationship between alpha-activity at different time points.

Main Results:

• Alpha amplitudes showed gradual increases across repeated ANF sessions.
• The maximum alpha amplitude at the start of ANF decreased over time within sessions.
• The rate of alpha-activity slowdown within sessions decreased with repeated training.
• A significant correlation was found between end-of-session alpha-activity and subsequent eye-opening alpha-activity.

Conclusions:

• ANF primarily enhances the self-maintenance capacity of alpha-activity.
• The training effect on alpha-activity extends beyond the immediate session, persisting to the next.
• Neurofeedback training improves the stability and retention of alpha-activity patterns.