Severe and extreme idiopathic median nerve lesions at the wrist: New insights into electrodiagnostic patterns and review of the literature
ABSTRACT Introduction : We evaluated the electrodiagnostic (EDX) pattern of severe and extreme median nerve lesions at the wrist (MNLW) in patients with idiopathic carpal tunnel syndrome. Methods : EDX data were recorded in 229 patients with 314 severe and extreme MNLW and 447 patients with 777 non‐...
| Published in: | Muscle & Nerve |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
2014
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1002/mus.24288 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fmus.24288 https://onlinelibrary.wiley.com/doi/pdf/10.1002/mus.24288 |
| Summary: | ABSTRACT Introduction : We evaluated the electrodiagnostic (EDX) pattern of severe and extreme median nerve lesions at the wrist (MNLW) in patients with idiopathic carpal tunnel syndrome. Methods : EDX data were recorded in 229 patients with 314 severe and extreme MNLW and 447 patients with 777 non‐severe MNLW. We recorded distal motor latency (DML) to abductor pollicis brevis (APB) and second lumbricalis (2L), sensory conduction (SC) from digits 2 and 3, and needle examination of APB. Results : Preservation rate of DML to APB and 2L and of SC from digits 2 and 3 were 100%, 100%, 85%, and 76%, respectively, for severe MNLW, and 37%, 90%, 36%, and 26% for extreme MNLW. Active denervation, as demonstrated by fibrillation potentials, was found in 1% of non‐severe NMLW, 7% of severe MNLW, and 56% of extreme MNLW cases. Conclusions : In idiopathic severe and extreme MNLW, the DML to the 2L and averaged SC from digit 2 can be present when other responses are absent. Muscle Nerve 51 : 201–206, 2015 |
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