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Conduction block in neuralgic amyotrophy.
B V Watson1, M W Nicolle, J D Brown
1Department of Clinical Neurological Sciences, London Health Sciences Centre, University Campus, 339 Windermere Road, P.O. Box 5339, London, Ontario, Canada.
Muscle & Nerve
|March 27, 2001
Summary
Neuralgic amyotrophy cases show brachial plexus conduction block. Early recovery suggests demyelination may be a primary factor in this nerve condition.
Area of Science:
- Neurology
- Neurophysiology
Background:
- Neuralgic amyotrophy is a rare neurological disorder affecting peripheral nerves.
- Understanding the electrophysiological underpinnings is crucial for diagnosis and prognosis.
Observation:
- Two cases of neuralgic amyotrophy presented with specific electrophysiological findings.
- Conduction block was identified in the lower trunk of the brachial plexus.
Findings:
- Low-output impedance stimulation and collision techniques precisely localized the conduction block.
- Complete electrophysiological recovery was observed within three months in both patients.
Implications:
- Early and complete recovery suggests demyelination may be a predominant early feature.
- This finding could influence early treatment strategies for neuralgic amyotrophy.