Which physical findings are characteristic of spinal muscular atrophy (SMA) type III - chronic juvenile or Kugelberg-Welander syndrome?

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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Children can ambulate, but they have proximal muscle weakness and various degrees of muscle hypotonia and wasting.

The lower extremities are often more severely affected than the upper extremities.

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