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EEG Spectral Analysis of Relaxation Techniques

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Abstract

The acute central nervous system effects of relaxation techniques (RT) have not been systematically studied. We conducted a controlled, randomized study of the central nervous system effects of RT using spectral analysis of EEG activity. Thirty-six subjects were randomized to either RT or a music comparison condition. After listening to an RT audiotape or music audiotapes daily for 6 weeks, the acute central nervous system effects of RT and music were measured using power spectral analysis of alpha and theta EEG activity in all cortical regions. RT produced significantly greater increases in theta activity in multiple cortical regions compared to the music condition. These findings are consistent with widespread reductions in cortical arousal during RT. They extend previous findings and suggest that theta, and not alpha, EEG may be the most reliable marker of the central nervous system effects of RT. These findings demonstrate that RT produce greater reductions in central nervous system activity than a credible comparison condition. The findings suggest that RT represent a hypoactive central nervous system state that may be similar to Stage 1 sleep and that RT may exert their therapeutic effects, in part, through cerebral energy conservation/restoration.

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Authors and Affiliations

  1. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachussets

    Gregg D. Jacobs

  2. Mind/Body Medical Institute, Chestnut Hill, Massachussets

    Gregg D. Jacobs & Richard Friedman

  3. State University of New York, Stony Brook, New York

    Richard Friedman

Authors
  1. Gregg D. Jacobs
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  2. Richard Friedman
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Correspondence to Gregg D. Jacobs.

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Jacobs, G.D., Friedman, R. EEG Spectral Analysis of Relaxation Techniques. Appl Psychophysiol Biofeedback 29, 245–254 (2004). https://doi.org/10.1007/s10484-004-0385-2

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  • DOI: https://doi.org/10.1007/s10484-004-0385-2

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