| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
The Journal of Neurophysiology Vol. 86 No. 3 September 2001, pp. 1321-1332
Copyright ©2001 by the American Physiological Society
1University Centre for Neuroscience and 2Department of Physiology, University of Alberta, Edmonton, Alberta T6G 2S2, Canada
Lam, Tania and
Keir G. Pearson.
Proprioceptive Modulation of Hip Flexor Activity During the
Swing Phase of Locomotion in Decerebrate Cats. J. Neurophysiol. 86: 1321-1332, 2001. This study examined the
influence of proprioceptive input from hip flexor muscles on the
activity in hip flexors during the swing phase of walking in the
decerebrate cat. One hindlimb was partially denervated to remove
cutaneous input and afferent input from most other hindlimb muscles.
Perturbations to hip movement were applied either by 1)
manual resistance or assistance to swing or by 2) resistance
to hip flexion using a device that blocked hip flexion but allowed leg
extension. Electromyographic recordings were made from the iliopsoas
(IP), sartorius, and medial gastrocnemius muscles. When the hip was
manually assisted into flexion, there was a reduction in hip flexor
burst activity. Conversely, when hip flexion was manually resisted or
mechanically blocked during swing, the duration and amplitude of hip
flexor activity was increased. We also found some specificity in the
role of afferents from individual hip flexor muscles in the modulation
of flexor burst activity. If the IP muscle was detached from its
insertion, little change in the response to blocking flexion was
observed. Specific activation of IP afferent fibers by stretching the
muscle also did not greatly affect flexor activity. On the other hand,
if conduction in the sartorius nerves was blocked, there was a
diminished response to blocking hip flexion. The increase in duration
of the flexor bursts still occurred, but this increase was consistently
lower than that observed when the sartorius nerves were intact. From these results we propose that during swing, feedback from hip flexor
muscle afferents, particularly those from the sartorius muscles,
enhances flexor activity. In addition, if we delayed the onset of
flexor activity in the contralateral hindlimb, blocking hip flexion
often resulted in the prolongation of ipsilateral flexor activity for
long periods of time, further revealing the reinforcing effects of
flexor afferent feedback on flexor activity. This effect was not seen
if conduction in the sartorius nerves was blocked. In conclusion, we
have found that hip flexor activity during locomotion can be strongly
modulated by modifying proprioceptive feedback from the hip flexor muscles.
This article has been cited by other articles:
|
|
 |
|
  W. J. Kargo and S. F. Giszter Individual Premotor Drive Pulses, Not Time-Varying Synergies, Are the Units of Adjustment for Limb Trajectories Constructed in Spinal Cord J. Neurosci., March 5, 2008; 28(10): 2409 - 2425. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 T. Onushko and B. D. Schmit Reflex Response to Imposed Bilateral Hip Oscillations in Human Spinal Cord Injury J Neurophysiol, October 1, 2007; 98(4): 1849 - 1861. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. E. Musselman and J. F. Yang Loading the Limb During Rhythmic Leg Movements Lengthens the Duration of Both Flexion and Extension in Human Infants J Neurophysiol, February 1, 2007; 97(2): 1247 - 1257. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Wu and B. D. Schmit Spastic Reflexes Triggered by Ankle Load Release in Human Spinal Cord Injury J Neurophysiol, December 1, 2006; 96(6): 2941 - 2950. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 I. A. Rybak, K. Stecina, N. A. Shevtsova, and D. A. McCrea Modelling spinal circuitry involved in locomotor pattern generation: insights from the effects of afferent stimulation J. Physiol., December 1, 2006; 577(2): 641 - 658. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. F. Yang and M. Gorassini Spinal and Brain Control of Human Walking: Implications for Retraining of Walking Neuroscientist, October 1, 2006; 12(5): 379 - 389. [Abstract] [PDF]
|
|
|
|
|
|
K. I. Ustinova, A. G. Feldman, and M. F. Levin Central Resetting of Neuromuscular Steady States May Underlie Rhythmical Arm Movements J Neurophysiol, September 1, 2006; 96(3): 1124 - 1134. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Duysens, D. McCrea, and M. Lafreniere-Roula How deletions in a model could help explain deletions in the laboratory J Neurophysiol, January 1, 2006; 95(1): 562 - 565. [Full Text] [PDF]
|
|
|
|
 |
|
 S. Rossignol, R. Dubuc, and J.-P. Gossard Dynamic Sensorimotor Interactions in Locomotion Physiol Rev, January 1, 2006; 86(1): 89 - 154. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
O. Ekeberg and K. Pearson Computer Simulation of Stepping in the Hind Legs of the Cat: An Examination of Mechanisms Regulating the Stance-to-Swing Transition J Neurophysiol, December 1, 2005; 94(6): 4256 - 4268. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
K. Stecina, J. Quevedo, and D. A. McCrea Parallel reflex pathways from flexor muscle afferents evoking resetting and flexion enhancement during fictive locomotion and scratch in the cat J. Physiol., November 15, 2005; 569(1): 275 - 290. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. A. McVea, J. M. Donelan, A. Tachibana, and K. G. Pearson A Role for Hip Position in Initiating the Swing-to-Stance Transition in Walking Cats J Neurophysiol, November 1, 2005; 94(5): 3497 - 3508. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. M. Blitz, M. P. Beenhakker, and M. P. Nusbaum Different Sensory Systems Share Projection Neurons But Elicit Distinct Motor Patterns J. Neurosci., December 15, 2004; 24(50): 11381 - 11390. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. A. Beres-Jones and S. J. Harkema The human spinal cord interprets velocity-dependent afferent input during stepping Brain, October 1, 2004; 127(10): 2232 - 2246. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. Saltiel and S. Rossignol Critical Points in the Forelimb Fictive Locomotor Cycle and Motor Coordination: Evidence From the Effects of Tonic Proprioceptive Perturbations in the Cat J Neurophysiol, September 1, 2004; 92(3): 1329 - 1341. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. Saltiel and S. Rossignol Critical Points in the Forelimb Fictive Locomotor Cycle and Motor Coordination: Effects of Phasic Retractions and Protractions of the Shoulder in the Cat J Neurophysiol, September 1, 2004; 92(3): 1342 - 1356. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. E. Steldt and B. D. Schmit Modulation of Coordinated Muscle Activity During Imposed Sinusoidal Hip Movements in Human Spinal Cord Injury J Neurophysiol, August 1, 2004; 92(2): 673 - 685. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 V. Dietz and S. J. Harkema Locomotor activity in spinal cord-injured persons J Appl Physiol, May 1, 2004; 96(5): 1954 - 1960. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. P. Beenhakker, D. M. Blitz, and M. P. Nusbaum Long-Lasting Activation of Rhythmic Neuronal Activity by a Novel Mechanosensory System in the Crustacean Stomatogastric Nervous System J Neurophysiol, January 1, 2004; 91(1): 78 - 91. [Abstract] [Full Text]
|
|
|
|
|
|
T. Lam, C. Wolstenholme, and J. F. Yang How Do Infants Adapt to Loading of the Limb During the Swing Phase of Stepping? J Neurophysiol, April 1, 2003; 89(4): 1920 - 1928. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. Brizzi, L. H. Ting, and D. Zytnicki Positive Proprioceptive Feedback Elicited By Isometric Contractions of Ankle Flexors on Pretibial Motoneurons in Cats J Neurophysiol, November 1, 2002; 88(5): 2207 - 2214. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| Visit Other APS Journals Online |
