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Updated: May 27, 2026
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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
Published on: February 23, 2020
Changes in motor function induced by chronic motor cortex stimulation in post-stroke pain patients
Takamitsu Yamamoto1, Yoichi Katayama, Mitsuru Watanabe
1Department of Advanced Medical Science, Division of Applied System Neuroscience, Nihon University School of Medicine, Tokyo, Japan. yamamoto.takamitsu@nihon-u.ac.jp
Stereotactic and Functional Neurosurgery
|November 23, 2011
Summary
Motor cortex stimulation (MCS) may improve motor weakness post-stroke. Limiting daily MCS to under 4 hours is crucial for enhancing motor function and avoiding increased rigidity, suggesting optimized stimulation parameters are key.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
- Medical Technology
Background:
- Previous studies show temporary motor cortex stimulation (MCS) aids motor recovery in post-stroke patients.
- Rehabilitation therapy combined with short-term MCS (3-6 weeks) has demonstrated some success.
Purpose of the Study:
- To investigate the long-term effects of MCS on motor weakness in post-stroke patients.
- To determine optimal stimulation conditions for improving motor function.
Main Methods:
- Chronic MCS was applied to 6 post-stroke patients with motor weakness over 6 months.
- Correlation between daily MCS duration and motor function (Fugl-Meyer Assessment score) was analyzed.
Main Results:
- Four patients with daily MCS < 4 hours showed improved upper extremity Fugl-Meyer Assessment scores.
- Two patients with excessive MCS (>4 hours) for pain management experienced worsened motor function due to increased rigidity/spasticity.
- Restricting MCS to < 4 hours daily led to motor function recovery in these two patients.
Conclusions:
- MCS shows potential as a therapeutic strategy for improving post-stroke motor performance by reducing rigidity/spasticity.
- Defining appropriate daily MCS duration and conditions is essential for effective treatment and avoiding adverse effects.
