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Related Experiment Videos

Biofeedback of slow cortical potentials. I.

T Elbert, B Rockstroh, W Lutzenberger

    Electroencephalography and Clinical Neurophysiology
    |March 1, 1980
    PubMed
    Summary

    This study shows that individuals can learn to self-regulate slow cortical potentials (SCP) using visual feedback. Participants successfully controlled their brain activity, demonstrating significant differences in SCP based on required polarity.

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    Area of Science:

    • Neuroscience
    • Cognitive Neuroscience
    • Psychophysiology

    Background:

    • Previous research indicated the existence of self-regulation for slow cortical potentials (SCP).
    • Understanding voluntary control over brain activity is crucial for various neurological and psychological applications.

    Purpose of the Study:

    • To investigate the self-regulation of slow cortical potentials (SCP) using real-time visual feedback.
    • To determine if subjects can voluntarily modulate SCP to achieve specific polarity states (negativity or positivity).

    Main Methods:

    • Seventeen subjects participated in an experiment involving two identical sessions.
    • Visual feedback of SCP was provided via a rocket on a TV screen.
    • Subjects received auditory cues (tones) to guide the rocket towards goals representing cortical negativity or positivity.

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    Main Results:

    • Highly significant differences in SCP were observed between the two required polarities.
    • The most significant SCP modulations occurred during feedback-absent test trials in the second session.
    • A distinct positive shift below baseline was noted when positivity (less negativity) was required.

    Conclusions:

    • Individuals can effectively learn to self-regulate slow cortical potentials (SCP) with appropriate feedback.
    • This demonstrates a capacity for voluntary control over specific brain activity patterns.
    • The findings have implications for understanding brain-computer interfaces and neurofeedback therapies.