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Sensory nerve conduction studies in neuralgic amyotrophy
Nens van Alfen1, Willem J Huisman, S Overeem
1Department of Clinical Neurophysiology, Donders Center for Neuroscience, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands.
Sensory nerve conduction studies show few abnormalities in neuralgic amyotrophy patients, even with clinical deficits. These tests have limited diagnostic value for this brachial plexus neuropathy.
Area of Science:
- Neurology
- Peripheral Nerve Disorders
Background:
- Neuralgic amyotrophy is a painful, episodic brachial plexus disorder.
- Sensory symptoms are reported in 80% of patients.
Purpose of the Study:
- To assess the diagnostic utility of sensory nerve conduction studies (SNCS) in neuralgic amyotrophy.
- To determine the frequency of SNCS abnormalities in affected nerves.
Main Methods:
- Evaluated 112 patients with neuralgic amyotrophy.
- Performed SNCS on lateral/medial antebrachial cutaneous, radial, median, and ulnar sensory nerves.
Main Results:
- Abnormalities found in <20% of nerves, irrespective of clinical deficits.
- Lateral and medial antebrachial cutaneous nerves showed the highest abnormality rates (15% and 17%).
Conclusions:
- Brachial plexus SNCS have limited diagnostic value for neuralgic amyotrophy.
- Sensory lesions may involve nerve roots; normal SNCS do not rule out the diagnosis.
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