What is the role of EMG in the workup of spinal muscle atrophy (SMA)?

Updated: Nov 05, 2018
  • Author: Ashish S Ranade, MBBS, MS, MRCS; Chief Editor: Jeffrey A Goldstein, MD  more...
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Answer

Findings from electromyography (EMG) in patients with SMA are characteristic of a neuropathic disorder, revealing fibrillation potentials, denervation, and increased amplitude. However, nerve conduction velocity test results are normal.


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