What is the role of mononeuropathies in the etiology of focal muscular atrophy (FMA)?

Updated: Feb 20, 2018
  • Author: Sridharan Ramaratnam, MD, MBBS; Chief Editor: Helmi L Lutsep, MD  more...
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  • Mononeuropathies result from pathology in a peripheral nerve that is secondary to trauma, leprosy, vasculitis, diabetes, or entrapment. These are common causes of FMA.

  • Common examples of FMA due to entrapment are thenar muscle wasting in carpal tunnel syndrome, hypothenar and interossei wasting in ulnar nerve entrapment at the elbow, infraspinatus wasting due to entrapment of the suprascapular nerve at the spinoglenoid notch, and muscle wasting in the anterolateral compartment of the leg due to entrapment of the common peroneal nerve at the fibular head.

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