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Related Experiment Videos

Brain asymmetry and autonomic conditioning: sensitization control

B H Johnsen1, K Hugdahl

  • 1Department of Biological and Medical Psychology, University of Bergen, Norway.

Integrative Physiological and Behavioral Science : the Official Journal of the Pavlovian Society
|October 1, 1994
PubMed
Summary

This study found that the right hemisphere is superior for learning emotional associations. Heart rate responses indicate a significant right hemisphere effect in classical conditioning to facial emotions.

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Area of Science:

  • Neuroscience
  • Psychology
  • Cognitive Science

Background:

  • Cerebral asymmetry, or laterality, influences cognitive processes.
  • Facial emotional stimuli are crucial for social interaction and emotional processing.

Purpose of the Study:

  • To investigate the role of cerebral asymmetry in classical conditioning of emotional facial stimuli.
  • To determine if specific brain hemispheres show superiority in learning emotional associations.

Main Methods:

  • Classical conditioning paradigm using happy and angry facial stimuli presented in different visual half-fields (VHFs).
  • Unconditioned stimulus (UCS) of shock paired with conditioned stimuli (CS).
  • Measurement of phasic heart rate responses (HR) and skin conductance responses (SCR) as dependent variables.

Related Experiment Videos

  • Extinction phase included a novel stimulus to control for sensitization.

    • Main Results:

    • A significant right hemisphere effect was observed for the conditioned stimulus-unconditioned stimulus (CS-UCS) association in heart rate responses.
    • This right hemisphere effect was not due to sensitization from the unconditioned stimulus.
    • No significant effects were found for skin conductance responses.

    Conclusions:

    • The right hemisphere demonstrates superiority in the learning of conditioned associations to emotional facial stimuli.
    • Heart rate responses are a sensitive indicator of hemispheric differences in emotional learning.