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Cutaneous reflexes in the avoidance reaction

H Dehen, J C Willer, J Cambier

    European Neurology
    |January 1, 1981
    PubMed
    Summary
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    An electrophysiological study revealed that avoidance reactions involve simultaneous flexor and extensor muscle activation. This differs fundamentally from grasp reflexes, indicating a significant disruption in muscle control reflex systems.

    Area of Science:

    • Neuroscience
    • Electrophysiology
    • Motor Control

    Background:

    • Cutaneous reflexes are crucial for protective responses.
    • Avoidance reactions and grasp reflexes are distinct motor control patterns.
    • Understanding reflex system disturbances is key to neurological research.

    Observation:

    • Electrophysiological study of a patient with an upper limb avoidance reaction.
    • Simultaneous activation of flexor and extensor muscles was observed.
    • This contrasts with the typical reciprocal inhibition seen in other reflexes.

    Findings:

    • The avoidance reaction demonstrates simultaneous flexor and extensor muscle activation.
    • This pattern is not the reciprocal electrophysiological counterpart of the grasp reflex.

    Related Experiment Videos

  • A fundamental disturbance in segmental reflex systems controlling muscle contraction is evident.

    • Implications:

    • The findings challenge existing models of reflex control.
    • Suggests a more complex neural circuitry underlying avoidance behaviors.
    • Provides insights into pathological muscle activation patterns in neurological disorders.