Sensorimotor integration in chronic stroke: Baseline differences and response to sensory training
Katlyn E Brown1, Jason L Neva2, Samantha J Feldman3
1Graduate Program in Rehabilitation Sciences, Faculty of Medicine, University of British Columbia, Vancouver, Canada.
Restorative Neurology and Neuroscience
|March 13, 2018
Summary
Chronic stroke affects sensorimotor integration differently depending on the type of sensory feedback. This integration is linked to motor function and can be improved with sensory training.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
- Motor Control
Background:
- Sensorimotor integration is crucial for motor function, informing movement with environmental sensory input.
- Motor deficits are common in chronic stroke recovery, necessitating investigation into contributing factors.
- The impact of chronic stroke on sensorimotor integration remains underexplored.
Purpose of the Study:
- To comprehensively assess chronic stroke's influence on sensorimotor integration.
- To determine if sensorimotor integration is modifiable through intervention.
- To establish the relationship between neurophysiological sensorimotor integration measures and post-stroke motor deficits.
Main Methods:
- Compared neurophysiological measures of sensorimotor integration in 14 chronic stroke survivors and 12 healthy controls.
- Assessed motor impairment and function in stroke survivors.
- Utilized nerve-based (afferent inhibition/facilitation) and vibration-based measures with transcranial magnetic stimulation (TMS) before and after sensory training.
Main Results:
- Vibration-based sensorimotor integration differed between stroke survivors and controls, indicating stroke's selective impact on somatosensory feedback processing.
- Sensorimotor integration measures correlated with motor function and impairment levels in stroke survivors.
- Sensory training successfully modulated sensorimotor integration in both groups.
Conclusions:
- Chronic stroke differentially affects sensorimotor integration based on afferent feedback type.
- Both nerve-based and vibration-based sensorimotor integration measures are relevant to motor impairment and function post-stroke.
- Sensory training offers a potential avenue for modifying sensorimotor integration in stroke recovery.
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