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Related Experiment Videos

The volitional nature of the simplest reflex

J R Wolpaw1, J S Carp

  • 1Wadsworth Center for Laboratories and Research, New York State Department of Health, Albany.

Acta Neurobiologiae Experimentalis
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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The vertebrate central nervous system (CNS) is adaptable, with even simple reflexes like the spinal stretch reflex (SSR) changing over time. Operant conditioning demonstrates this plasticity, involving complex changes in the CNS.

Area of Science:

  • Neuroscience
  • Physiology
  • Behavioral Science

Background:

  • Vertebrate central nervous system (CNS) behaviors are not immutable.
  • Even basic reflexes exhibit adaptive plasticity.
  • The spinal stretch reflex (SSR) is a fundamental two-neuron, monosynaptic reflex.

Purpose of the Study:

  • To investigate the adaptive plasticity of the spinal stretch reflex (SSR).
  • To examine the effects of operant conditioning on the SSR.
  • To understand the CNS mechanisms underlying conditioned reflex changes.

Main Methods:

  • Utilized operant conditioning techniques to modify the SSR in vertebrates.
  • Monitored changes in reflex response over days and weeks.
  • Analyzed CNS plasticity at both spinal and supraspinal levels.

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Main Results:

  • Demonstrated that the SSR can be gradually modified through operant conditioning.
  • Observed significant adaptive changes in reflex behavior over time.
  • Identified complex patterns of CNS plasticity associated with conditioned SSR changes.

Conclusions:

  • The vertebrate CNS, including simple reflexes like the SSR, is highly adaptable.
  • Operant conditioning is a viable method for inducing long-term changes in reflex pathways.
  • Conditioned SSR modification involves widespread plasticity across spinal and supraspinal CNS sites.