Accessory muscles of the forearm, wrist and hand
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Accessory muscles of the forearm, wrist and hand are normal muscular usually asymptomatic anatomical variants that might be encountered on imaging studies and confused with pathologic conditions.
The following accessory muscles around the forearm wrist and hand have been described 1-6:
- elbow
-
volar wrist midline
- palmaris longus variants (common)
- palmaris longus profundus
- aberrant palmaris longus
- palmaris longus variants (common)
-
volar wrist radial-side
- accessory flexor digitorum superficialis indicis
- flexor indices profundus
- flexor carpi radialis vel profundus
- accessory head of the flexor pollicis longus (common)
- volar wrist ulnar-side
- dorsal wrist
Radiographic features
Accessory muscles look like other muscles in imaging studies.
Radiology report
The radiological report should include a description of the following features:
- accessory muscle with location
- nerve compression syndromes
Clinical importance
Accessory muscles might mimic pathological conditions such as tumours or mass lesions.
Related pathology
Accessory muscles of the forearm, wrist, and hand have been implicated in the following clinical conditions 1-5:
- nerve compression syndromes
- wrist pain
-<li><a title="Accessory extensor carpi radialis" href="/articles/additional-radial-wrist-extensor-muscles">accessory extensor carpi radialis</a></li>- +<li><a href="/articles/additional-radial-wrist-extensor-muscles">accessory extensor carpi radialis</a></li>
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