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Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
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Brain Activity and Functional Connectivity Associated with Hypnosis.

Heidi Jiang1,2, Matthew P White1, Michael D Greicius3

  • 1Department of Psychiatry & Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94304, USA.

Cerebral Cortex (New York, N.Y. : 1991)
|July 30, 2016
PubMed
Summary
This summary is machine-generated.

Hypnosis involves distinct brain activity changes, including reduced default mode network (DMN) activity and altered functional connectivity between executive control network (ECN) and salience network (SN). These neural shifts explain hypnosis

Keywords:
brain activityfMRIfunctional connectivityhypnosisresting state

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Hypnosis has clinical applications, but its underlying neural mechanisms remain unclear.
  • Prior studies link hypnosis to reduced default mode network (DMN) activity and altered executive control network (ECN) and salience network (SN) connectivity.

Purpose of the Study:

  • To investigate brain activity and functional connectivity within the DMN, ECN, and SN during hypnosis.
  • To correlate neural changes with hypnotizability levels.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used on 57 healthy participants with varying hypnotizability.
  • Participants underwent fMRI scans during rest, memory retrieval, and two hypnosis conditions.
  • Specific brain regions, including dorsolateral prefrontal cortex (ECN), insula (SN), and posterior cingulate cortex (DMN), were used as seeds for connectivity analysis.

Main Results:

  • Hypnosis was associated with reduced activity in the dorsal anterior cingulate cortex (dACC).
  • Increased functional connectivity was observed between the ECN (dorsolateral prefrontal cortex) and the SN (insula).
  • Reduced functional connectivity was found between the ECN (dorsolateral prefrontal cortex) and the DMN (posterior cingulate cortex).

Conclusions:

  • Observed neural changes, including altered network connectivity and activity, provide a basis for understanding the hypnotic state.
  • These findings support the role of focused attention, enhanced control, and reduced self-consciousness in hypnosis.
  • The study elucidates the neural underpinnings of hypnosis, linking brain network dynamics to subjective experiences.