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Related Experiment Videos

Asymmetries in classically conditioned head movements and cingulate cortex slow potentials in cats.

M Penttonen1, T Korhonen, K Hugdahl

  • 1Department of Psychology, University of Jyväskylä, Finland.

The International Journal of Neuroscience
|November 1, 1991
PubMed
Summary

Cats developed a preferred leftward head turn during conditioning, showing increased right cingulate cortex activity. This suggests a hemispheric bias in the brain

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Area of Science:

  • Neuroscience
  • Animal Behavior
  • Cerebral Cortex Research

Background:

  • Head movement conditioning in animals can reveal underlying neural asymmetries.
  • Cingulate cortex plays a role in motor control and decision-making.
  • Discriminative conditioning involves learning to respond to specific stimuli.

Purpose of the Study:

  • To investigate hemispheric asymmetries in the cat cingulate cortex during auditory discriminative conditioning.
  • To determine if conditioned head movements correlate with specific patterns of brain activity.
  • To explore potential population biases between brain hemispheres.

Main Methods:

  • Cats underwent discriminative conditioning using auditory stimuli (CS) and hypothalamic electrical stimulation (US).

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  • Head movements (conditioned response) and cingulate cortex slow potentials were bilaterally recorded.
  • Analysis focused on differences in responses to CS+ versus CS- and between hemispheres.

    • Main Results:

    • Cats predominantly exhibited a leftward head turn as the conditioned response (CR).
    • Increased negativity in the right cingulate cortex was observed during the CR, specifically 128-324 ms after CS onset.
    • No significant differences were found based on the side of unconditioned stimulus (US) stimulation.

    Conclusions:

    • A consistent leftward bias in conditioned head movements was observed across most subjects.
    • Asymmetrical activation in the cingulate cortex, particularly the right hemisphere, suggests a neural basis for this behavioral bias.
    • The findings indicate a population bias between cerebral hemispheres influencing learned motor behavior.