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Magnetic coil stimulation of the brachial plexus
1Brown University Medical School, Providence, RI.
Archives of Physical Medicine and Rehabilitation
|September 1, 1993
Summary
Magnetic stimulation provides a comfortable and effective method for assessing the brachial plexus, establishing new normal values for latency measurements. This technique proves advantageous over electrical stimulation, especially in cases where traditional methods fail.
Area of Science:
- Neuroscience
- Clinical Electrophysiology
Background:
- Brachial plexus assessment is crucial for diagnosing neurological conditions.
- Current electrophysiological methods like electrical stimulation can be uncomfortable and sometimes ineffective.
Purpose of the Study:
- To establish a protocol and normative values for magnetic stimulation of the brachial plexus.
- To compare the efficacy and patient comfort of magnetic versus electrical stimulation.
- To demonstrate the utility of magnetic stimulation in challenging clinical cases.
Main Methods:
- Magnetic stimulation was applied to the brachial plexus at the mid-clavicular point in twenty healthy subjects.
- Normal latencies were recorded for multiple muscles including abductor pollicis brevis, biceps, and deltoid.
- Patient comfort was compared between magnetic and electrical stimulation methods.
Main Results:
- Established normal latency values for magnetic brachial plexus stimulation.
- Magnetic stimulation values were comparable to established electrical stimulation data.
- Magnetic stimulation was reported as more comfortable by patients.
- Successfully obtained recordings in two cases where electrical stimulation failed.
Conclusions:
- Magnetic stimulation offers a viable, comfortable, and effective alternative for brachial plexus evaluation.
- This method provides a valuable tool for diagnosing brachial plexus injuries, particularly when electrical stimulation is insufficient.