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Related Experiment Videos

Biofeedback produced slow brain potentials and task performance

W Lutzenberger, T Elbert, B Rockstroh

    Biological Psychology
    |February 1, 1982
    PubMed
    Summary
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    Brain biofeedback training helped subjects control slow cortical potential (SP) shifts. Increased negativity before a task sped up cognitive performance, suggesting SPs prepare the brain for action.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Biofeedback Research

    Background:

    • Slow cortical potentials (SPs) are slow voltage changes in the brain.
    • Biofeedback allows individuals to learn voluntary control over physiological processes.
    • Understanding SP modulation may offer insights into cognitive preparation.

    Purpose of the Study:

    • To investigate if subjects can learn to control slow cortical potential (SP) shifts using biofeedback.
    • To determine the effect of experimentally modulated SPs on cognitive task performance.

    Main Methods:

    • Twenty subjects underwent biofeedback training to modulate negative SP shifts.
    • Training involved adjusting SPs based on auditory cues and visual feedback.
    • Cognitive performance was assessed by response times to arithmetic problems following SP modulation.

    Related Experiment Videos

    Main Results:

    • Subjects successfully learned to control SP shifts through biofeedback.
    • Increased cortical negativity preceding task onset led to faster cognitive task performance.
    • Suppression of negativity resulted in slower response times.

    Conclusions:

    • Voluntary control of SPs is achievable via biofeedback.
    • Negative SP shifts appear to reflect a state of non-specific cortical preparation for cognitive tasks.
    • This suggests a direct link between cortical excitability and cognitive readiness.