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Hypnotizability and Performance on a Prism Adaptation Test.

Manuel Menzocchi¹, Giulio Mecacci¹, Andrea Zeppi¹

¹Department of Medical and Surgical Sciences and Neuroscience, University of Siena, Siena, Italy.

Cerebellum (London, England)

|April 28, 2015

Summary

Hypnotizability, a measure of hypnosis susceptibility, is linked to physiological differences. High hypnotizable individuals show impaired cerebellar sensorimotor integration, suggesting the cerebellum plays a key role in hypnosis.

Keywords:

Accuracy Cerebellum Hypnotizability Nitric oxide Prismatic adaptation Sensorimotor integration

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Area of Science:

Neuroscience
Psychology

Background:

Hypnotizability is more than a cognitive trait, with known physiological correlates.
Sensorimotor integration differences suggest a role for the cerebellum in high hypnotizability.

Purpose of the Study:

To investigate the cerebellum's role in hypnotizability using behavioral evidence.
To compare sensorimotor integration in high and low hypnotizable individuals.

Main Methods:

Administered the Prism Adaptation Test (PAT) to 20 high and 21 low hypnotizable participants.
Assessed performance accuracy and variability in sensorimotor integration tasks.

Main Results:

High hypnotizable individuals exhibited significantly less accurate and more variable performance on the PAT compared to low hypnotizable individuals.
Both groups demonstrated similar adaptation to prismatic lenses, isolating performance differences to cerebellar control.

Conclusions:

Hypnotizability influences cerebellar control of sensorimotor integration.
Findings support the hypothesis of a significant cerebellar role in the neurophysiological underpinnings of hypnosis.