What is the role of NCS in the workup of spinal muscular atrophy (SMA)?

Updated: May 29, 2019
  • Author: Jeffrey Rosenfeld, MD, PhD, FAAN; Chief Editor: Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP  more...
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Answer

Electrophysiologic studies are useful in differentiating the spinal muscular atrophies from other neurogenic and myopathic diseases. [41, 42] With the exception of Kennedy and Davidenkow syndromes, sensory nerve conduction is normal in spinal muscular atrophy.


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