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Network Analysis of the Default Mode Network Using Functional Connectivity MRI in Temporal Lobe Epilepsy
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Published on: August 5, 2014

Hypnotic induction decreases anterior default mode activity.

William J McGeown1, Giuliana Mazzoni, Annalena Venneri

  • 1Department of Psychology, University of Hull, UK.

Consciousness and Cognition
|September 29, 2009
PubMed
Summary
This summary is machine-generated.

Hypnosis can uniquely alter brain activity in highly suggestible individuals. During hypnosis, the default mode network in the brain shows reduced activity without compensatory increases elsewhere.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Psychology

Background:

  • The default mode network (DMN) comprises cortical regions active during rest.
  • Typically, decreased DMN activity correlates with increased task-relevant neural activation.
  • Previous research has not explored hypnosis's specific impact on DMN activity during rest.

Purpose of the Study:

  • To investigate the effect of hypnotic induction on brain activity, specifically within the default mode network.
  • To compare brain activation patterns in individuals with high versus low hypnotic suggestibility.
  • To determine if hypnosis alters resting-state brain activity independently of task engagement.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to assess brain activation.
  • Participants included individuals categorized as highly and lowly suggestible.
  • Brain activity was recorded during resting states and visual tasks, both with and without hypnotic induction.

Main Results:

  • Highly suggestible participants under hypnosis exhibited reduced activity in anterior DMN regions.
  • This reduction in DMN activity occurred without a corresponding increase in other cortical areas.
  • Low suggestibility participants showed no significant changes in DMN regions but displayed deactivation in alertness-related areas.

Conclusions:

  • Hypnotic induction induces a distinct pattern of brain activation in highly suggestible subjects.
  • The findings suggest that hypnosis modulates neural activity in a manner specific to suggestibility levels.
  • This research highlights the unique neural underpinnings of hypnosis in susceptible individuals.