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The Relationship Between Enhanced Reticulospinal Outflow and Upper Limb Function in Chronic Stroke Patients
Supriyo Choudhury1, A Shobhana1, Ravi Singh1
11 Institute of Neurosciences, Kolkata, India.
Neurorehabilitation and Neural Repair
|March 28, 2019
Summary
The reticulospinal tract may aid stroke recovery. An enhanced StartReact effect in stroke survivors indicates greater reticulospinal tract activity, particularly with higher spasticity and poorer motor function.
Area of Science:
- Neuroscience
- Stroke Rehabilitation
- Motor Control
Background:
- The reticulospinal tract is implicated in upper limb motor recovery post-stroke.
- Evaluating markers of reticulospinal output can provide insights into stroke recovery mechanisms.
Purpose of the Study:
- To assess reticulospinal tract output using the StartReact effect in stroke survivors.
- To correlate StartReact effect with upper limb motor function, spasticity, and wrist movement.
Main Methods:
- 95 stroke patients and 19 healthy controls performed a reaction time task with auditory startle.
- The StartReact effect was measured as the difference in electromyogram response time.
- Upper limb function (ARAT), spasticity (MAS), and active wrist movement were assessed.
Main Results:
- Stroke patients exhibited a significantly larger StartReact effect compared to controls.
- A larger StartReact effect correlated negatively with upper limb function and active wrist movement.
- Increased spasticity was associated with a larger StartReact effect.
Conclusions:
- An enhanced StartReact effect in stroke survivors may reflect compensatory strengthening of the reticulospinal tract.
- This compensatory mechanism appears more prominent in patients with severe corticospinal tract damage and higher spasticity.
- The findings suggest a differential role of the reticulospinal tract in motor recovery based on corticospinal tract integrity.
Keywords:
Action Research Arm Testreticulospinal tractspasticitystroke rehabilitationupper limb functionMore Related Videos
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