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Updated: Jul 31, 2026

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Published on: April 18, 2011
Motor cortical cell discharge during voluntary gait modification.
1Départment de Physiologie, Faculté de Medécine, Université de Montréal, Qué, Canada.
Cats adjust forelimb muscle activity and limb trajectory to step over obstacles. Motor cortex neurons show increased activity during these gait adjustments, suggesting a role in adapting locomotion.
Area of Science:
- Neuroscience
- Locomotion
- Motor Control
Background:
- Gait modification is crucial for navigating complex environments.
- The neural mechanisms underlying adaptive locomotion are not fully understood.
Purpose of the Study:
- To investigate the role of the motor cortex in adjusting limb trajectory and muscle activity during obstacle negotiation in cats.
Main Methods:
- Recorded kinematic and electromyographic data alongside motor cortical cell activity in cats.
- Cats performed a task requiring them to step over obstacles on a moving treadmill belt.
Main Results:
- Cats exhibited significant adjustments in limb trajectory and forelimb flexor muscle activity to overcome obstacles.
- A subset of motor cortex neurons (pyramidal tract neurons) showed increased discharge rates during gait adjustments.
Conclusions:
- The motor cortex appears to play a significant role in modulating flexor muscle activity for adaptive locomotor tasks.
- These findings contribute to understanding how the brain controls dynamic movements and adapts to environmental challenges.
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