What is the role of muscle ultrasound in the workup 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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Ultrasound can help visualize abnormalities such as muscle atrophy due to root, plexus, and nerve lesions. [53]

Spontaneous EMG activity correlates closely with abnormal ultrasonographic findings (especially with increased muscular echo intensity).

Ultrasonography is considered by some authors to be as sensitive as manual muscle testing and EMG in detecting muscle involvement. However, large studies comparing the sensitivity and specificity of muscle ultrasound and EMG in the diagnosis of neuromuscular diseases are not available.

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