Monomelic atrophy

Can J Neurol Sci. 1990 May;17(2):124-30. doi: 10.1017/s0317167100030316.


Weakness of distal muscles of one upper limb which progresses over 1 year and then appears to arrest ("monomelic amyotrophy") has been reported mainly in Japan and India. We report 5 cases of a similar syndrome occurring in Canada. In our cases the wasting affected the forearm muscles of one upper limb (sparing brachioradialis and extensor carpi radialis). There was minimal wasting and electromyographic changes in the opposite upper limb. The CT myelogram showed unilateral wasting of the cervical cord.

Publication types

  • Case Reports

MeSH terms

  • Adolescent
  • Adult
  • Functional Laterality / physiology
  • Humans
  • Magnetic Resonance Imaging*
  • Male
  • Muscular Diseases / diagnosis
  • Muscular Diseases / diagnostic imaging
  • Muscular Diseases / physiopathology*
  • Radiography
  • Spinal Cord / diagnostic imaging*
  • Spinal Cord / pathology