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Related Experiment Videos

Stance control in the chronic spinal cat

C A Pratt1, J Fung, J M Macpherson

  • 1Robert S. Dow Neurological Sciences Institute, Good Samaritan Hospital and Medical Center, Portland, Oregon 97209.

Journal of Neurophysiology
|May 1, 1994
PubMed
Summary
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Spinal cats regained some weight support and stance control after spinal transection. However, full lateral stability was not achieved, indicating limited balance control from passive muscle properties and reflexes.

Area of Science:

  • Neuroscience
  • Locomotion and Balance Studies

Background:

  • Complete spinal transection (T12) significantly impairs postural control.
  • Understanding recovery mechanisms is crucial for rehabilitation strategies.

Purpose of the Study:

  • To investigate the longitudinal recovery of quiet and perturbed stance control after T12 spinal transection in a cat.
  • To determine the contribution of passive muscle properties and segmental reflexes to balance in chronic spinal animals.

Main Methods:

  • A cat underwent complete spinal transection at T12.
  • Post-transection, the cat was trained daily on a movable force platform for one year.
  • Stance control was assessed during quiet standing and responses to support surface translations.

Main Results:

Related Experiment Videos

  • The spinal cat achieved full weight support and intermittent lateral stability control within one month.
  • Independent stance for up to 45 seconds and successful responses to 62-97% of translations were observed within two months.
  • Control of lateral stability remained compromised, with head movements and stepping tendencies being destabilizing.

Conclusions:

  • Partial recovery of hindquarter lateral stability in spinal cats relies on passive muscle properties and segmental reflexes.
  • These mechanisms provide limited balance control in the chronic spinal state.