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Journal article
A sensory signal related to left-right symmetry modulates intra- and interlimb cutaneous reflexes during locomotion in intact cats
Frontiers in systems neuroscience, v 17
09 Jun 2023
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Abstract
Introduction: During locomotion, cutaneous reflexes play an essential role in rapidly responding to an external perturbation, for example, to prevent a fall when the foot contacts an obstacle. In cats and humans, cutaneous reflexes involve all four limbs and are task- and phase modulated to generate functionally appropriate whole-body responses.
Methods: To assess task-dependent modulation of cutaneous interlimb reflexes, we electrically stimulated the superficial radial or superficial peroneal nerves in adult cats and recorded muscle activity in the four limbs during tied-belt (equal left-right speeds) and split-belt (different left-right speeds) locomotion.
Results: We show that the pattern of intra- and interlimb cutaneous reflexes in fore- and hindlimbs muscles and their phase-dependent modulation were conserved during tied-belt and split-belt locomotion. Short-latency cutaneous reflex responses to muscles of the stimulated limb were more likely to be evoked and phase-modulated when compared to muscles in the other limbs. In some muscles, the degree of reflex modulation was significantly reduced during split-belt locomotion compared to tied-belt conditions. Split-belt locomotion increased the step-by-step variability of left-right symmetry, particularly spatially.
Discussion: These results suggest that sensory signals related to left-right symmetry reduce cutaneous reflex modulation, potentially to avoid destabilizing an unstable pattern.
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Details
- Title
- A sensory signal related to left-right symmetry modulates intra- and interlimb cutaneous reflexes during locomotion in intact cats
- Creators
- Stephen Mari - Université de SherbrookeCharly G. Lecomte - Université de SherbrookeAngèle N. Merlet - Université de SherbrookeJohannie Audet - Université de SherbrookeJonathan Harnie - Université de SherbrookeIlya A. Rybak - Drexel UniversityBoris I. Prilutsky - Georgia Institute of TechnologyAlain Frigon - Université de Sherbrooke
- Publication Details
- Frontiers in systems neuroscience, v 17
- Publisher
- Frontiers Media S.A
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Neurobiology and Anatomy
- Web of Science ID
- WOS:001010818300001
- Scopus ID
- 2-s2.0-85163633795
- Other Identifier
- 991020600515604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Neurosciences