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Brain. 2004 Aug;127(Pt 8):1741-7. Epub 2004 Jul 1.

Increased anterior corpus callosum size associated positively with hypnotizability and the ability to control pain.

Author information

1
Department of Social and Behavioral Sciences, The University of Virginia's College at Wise, 1 College Avenue, Wise, VA 24293-4412, USA. jhorton@uvawise.edu

Abstract

This is the first MRI study to report differences in brain structure size between low and highly hypnotizable, healthy, right-handed young adults. Participants were stringently screened for hypnotic susceptibility with two standardized scales, and then exposed to hypnotic analgesia training to control cold pressor pain. Only the highly hypnotizable subjects (HHs) who eliminated pain perception were included in the present study. These HHs, who demonstrated more effective attentional and inhibitory capabilities, had a significantly (P < 0.003) larger (31.8%) rostrum, a corpus callosum area involved in the allocation of attention and transfer of information between prefrontal cortices, than low hypnotizable subjects (LHs). These results provide support to the neuropsychophysiological model that HHs have more effective frontal attentional systems implementing control, monitoring performance and inhibiting unwanted stimuli from conscious awareness, than LHs.

PMID:
15231582
DOI:
10.1093/brain/awh196
[Indexed for MEDLINE]

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