Analysis of the Pattern of Activity in “Knee Flexor” Motoneurons During Locomotion in the Cat

  • C. Perret
  • J.-M. Cabelguen
  • D. Orsal


During fictive locomotion of the thalamic cat, the pattern of membrane potential variations in motoneurons of the posterior biceps-semitendinosus muscle is complex. Periods of chloride dependent inhibition, alternating with excitatory periods, were identified during the second part of the flexor phase and in the mid-extensor phase. These excitatory and inhibitory influences were shown to be selectively controlled by tonic afferent inputs from the ipsilateral hindlimb. The results are discussed in relation with the organization of the central pattern generators for hindlimb and forelimb locomotor movements.


Rectus Femoris Knee Flexor Membrane Potential Oscillation Inhibitory Synaptic Input Fictive Locomotion 
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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • C. Perret
    • 1
  • J.-M. Cabelguen
    • 1
  • D. Orsal
    • 1
  1. 1.Département de Neurophysiologie comparéeInstitut des NeurosciencesParis, Cedex 05France

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