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Hemispheric activation, affective judgments, and pain perception

M W Otto1, R A Yeo

  • 1Behavior Therapy Unit, Massachusetts General Hospital, Boston 02114.

Psychotherapy and Psychosomatics
|January 1, 1993
PubMed
Summary

This study explored how brain hemisphere processing affects emotional responses and pain. While results didn't show hemisphere differences in emotion, unilateral visual stimulation impacted pain perception in women.

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Area of Science:

  • Neuroscience
  • Psychology
  • Pain Perception Research

Background:

  • The right hemisphere is often associated with processing emotions and pain.
  • Previous research suggests hemispheric differences in affective judgments.
  • Understanding brain lateralization's role in sensory processing is crucial.

Purpose of the Study:

  • To investigate the influence of right hemisphere processing on affective judgments using unilateral visual stimulation.
  • To examine how unilateral visual stimulation affects pain perception.
  • To explore potential differences in emotional responses to stimuli presented to either hemisphere.

Main Methods:

  • A unique contact lens method was employed for unilateral visual stimulation.
  • Participants rated the affect of films presented to one visual field.

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  • A cold pressor pain task assessed pain sensitivity under unilateral stimulation.

    • Main Results:

    • The study did not replicate previous findings of differential affective judgments based on visual field stimulation.
    • A significant association was found between unilateral visual stimulation and pain lateralization in female subjects.
    • No significant differences in affective judgments were observed between right and left visual stimulation.

    Conclusions:

    • Hemispheric differences in affective judgments were not supported by this study.
    • Attentional processes may mediate the observed pain lateralization in women.
    • The contact lens design may present limitations for future research in hemispheric processing.