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Relateralizing hypnosis: or, have we been barking up the wrong hemisphere?
P Jasiukaitis1, B Nouriani, K Hugdahl
1Stanford University School of Medicine, USA.
Summary
Recent research suggests the left cerebral hemisphere, not the right, plays a key role in hypnosis. This challenges older theories and highlights the left hemisphere's function in focused attention and language during hypnotic states.
Area of Science:
- Neuroscience
- Psychology
Background:
- Historically, hypnosis research emphasized right-hemisphere brain activity.
- Emerging evidence suggests a more complex hemispheric involvement.
Purpose of the Study:
- To re-evaluate the role of cerebral hemispheres in hypnotic phenomena.
- To propose a left-hemisphere theory of hypnosis based on recent findings.
Main Methods:
- Review of electrodermal responding data.
- Analysis of visual event-related potentials.
- Examination of Stroop interference paradigms.
Main Results:
- Evidence supports a role for the left hemisphere in specific hypnotic phenomena.
- Hemispheric activation during hypnosis is task-dependent.
- Concentrated attention and language processing in hypnosis align with left-hemisphere functions.
Conclusions:
- Hypnotic phenomena involving focused attention and language may be primarily left-hemisphere functions.
- A left-hemisphere model of hypnosis is proposed, integrating theories of synthetic capabilities and motor program implementation.