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Effects of Shank Vibration on Lean After-Effect
David R Young1,2, Charles S Layne1,2,3
1Department of Health and Human Performance, University of Houston, Houston, Texas, USA.
Journal of Motor Behavior
|September 4, 2020
Summary
Sensory reweighting influences the lean after-effect (LAE) by altering central perception, not peripheral sensors. Perturbing proprioception during the after-effect significantly impacts LAE magnitude and duration.
Area of Science:
- Neuroscience
- Biomechanics
- Human Motor Control
Background:
- Postural adaptability relies on central sensory integration and efficient reweighting of sensory inputs.
- Incline interventions induce a lean after-effect (LAE), but the role of sensory reweighting in modulating LAE is not fully understood.
Purpose of the Study:
- To investigate how sensory reweighting affects the magnitude and duration of the lean after-effect (LAE).
- To examine the influence of proprioceptive perturbation during and after incline interventions on LAE.
Main Methods:
- Fifteen healthy young adults performed incline interventions.
- Proprioception was perturbed using tendon vibration under various support surface configurations during or after the incline intervention.
Main Results:
- Support surface configuration influenced responses to tendon vibration.
- Tendon vibration during the incline intervention did not inhibit the lean after-effect (LAE).
- Tendon vibration applied during the after-effect phase significantly altered LAE.
Conclusions:
- Postural adaptation is primarily mediated by central perceptual modifications rather than peripheral shank proprioceptors.
- Sensory reweighting plays a crucial role in the central integration of sensory information for postural adaptability.
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