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Proprioceptive control of interjoint coordination

C Ghez1, R Sainburg

  • 1Center for Neurobiology and Behavior, New York State Psychiatric Institute, College of Physicians and Surgeons, Columbia University, New York 10032, USA.

Canadian Journal of Physiology and Pharmacology
|February 1, 1995
PubMed
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Proprioception is crucial for controlling limb movements and interaction torques. Without it, patients struggle with movement reversals, but vision can partially compensate for this sensory loss.

Area of Science:

  • Neuroscience
  • Motor Control
  • Biomechanics

Background:

  • Proprioception, the sense of limb position and movement, is vital for motor control.
  • Dynamic interactions between limb segments generate complex torques during movement.
  • Understanding sensory feedback's role in motor control is key to rehabilitation.

Purpose of the Study:

  • To investigate the role of proprioception in controlling dynamic interactions between limb segments.
  • To examine how deafferentation affects movement control in planar and 3D tasks.
  • To determine if visual feedback can substitute for proprioception in motor learning.

Main Methods:

  • Comparison of intact controls and functionally deafferented patients.
  • Analysis of hand path control in a planar movement-reversal task without visual feedback.

Related Experiment Videos

  • Assessment of interjoint coordination during unconstrained 3D gestures with movement reversals.

    • Main Results:

    • Deafferented patients exhibited desynchronization in joint motion reversals, leading to widened hand paths.
    • Patients showed an inability to account for interaction torques at the elbow.
    • Practice with visual monitoring significantly reduced errors, indicating improved motor planning rules.

    Conclusions:

    • Movement planning and learning rely on an internal limb dynamics model accounting for interaction torques.
    • Proprioceptive information is essential for establishing and updating this internal model.
    • Visual feedback can partially substitute for proprioception when it is absent.