Spectral Dynamics and Therapeutic Implications of the Theta/Alpha Crossover in Alpha-Theta Neurofeedback

Autores/as

  • Mark L. Johnson
  • Eugenia Bodenhamer-Davis
  • Laurie J. Bailey
  • Michael S. Gates

DOI:

https://doi.org/10.1080/10874208.2013.758968

Resumen

The theta-over-alpha frequency crossover seen in alpha-theta neurofeedback, considered an important factor in the treatment’s success, has had little definitive research. This study examined 182 alpha-theta session graphs from 10 subject case files for interactions between frequency band activity and subject reports of imagery or biographical memories during crossovers, as well as treatment outcomes. Statistical analyses revealed significantly more reports of imagery/memories during crossover conditions having specific spectral, amplitude, and duration characteristics. Imagery reports were more likely to occur during crossover
activity of 1 microvolt or more, lasting at least 3 minutes, and including 3.75mv of 15–20 Hz beta. This defined therapeutic crossover condition also was significantly related to better treatment outcome measures.

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Publicado

2016-08-23

Número

Vol. 17 Núm. 1 (2013)

Sección

SCIENTIFIC FEATURES

Licencia

© International Society for Neurofeedback and Research (ISNR), all rights reserved. This article (the “Article”) may be accessed online from ISNR at no charge. The Article may be viewed online, stored in electronic or physical form, or archived for research, teaching, and private study purposes. The Article may be archived in public libraries or university libraries at the direction of said public library or university library. Any other reproduction of the Article for redistribution, sale, resale, loan, sublicensing, systematic supply, or other distribution, including both physical and electronic reproduction for such purposes, is expressly forbidden. Preparing or reproducing derivative works of this article is expressly forbidden. ISNR makes no representation or warranty as to the accuracy or completeness of any content in the Article.  From 1995 to 2013 the Journal of Neurotherapy was the official publication of ISNR (www. Isnr.org); on April 27, 2016 ISNR acquired the journal from Taylor & Francis Group, LLC. In 2014, ISNR established its official open-access journal NeuroRegulation (ISSN: 2373-0587; www.neuroregulation.org).