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 muscle
- aberrant palmaris longus muscle
- palmaris longus variants (common)
-
volar wrist radial-side
- accessory flexor digitorum superficialis indicis muscle
- flexor
indicesindicis profundus muscle - flexor carpi radialis vel profundus muscle
- accessory head of the flexor pollicis longus muscle(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
-<p><strong>Accessory muscles of the forearm, wrist and hand </strong>are normal muscular usually asymptomatic anatomical variants that might be encountered on imaging studies and confused with pathologic conditions.</p><p>The following accessory muscles around the forearm wrist and hand have been described <sup>1-6</sup>:</p><ul>- +<p><strong>Accessory muscles of the forearm, wrist and hand </strong>are muscular, usually asymptomatic, anatomical variants that might be encountered on imaging studies and confused with pathologic conditions.</p><p>The following accessory muscles around the <a title="Forearm" href="/articles/forearm">forearm</a>, <a title="Wrist" href="/articles/wrist">wrist</a> and <a title="Hand (anatomy)" href="/articles/hands">hand</a> have been described <sup>1-6</sup>:</p><ul>
-<strong>elbow</strong><ul><li><a href="/articles/anconeus-epitrochlearis">anconeus epitrochlearis</a></li></ul>- +<strong>elbow</strong><ul>
- +<li>
- +<a title="Accessory brachialis muscle" href="/articles/accessory-brachialis-muscle">accessory brachialis muscle</a> (rare)</li>
- +<li><a href="/articles/anconeus-epitrochlearis">anconeus epitrochlearis muscle</a></li>
- +</ul>
-<li>palmaris longus profundus</li>-<li>aberrant palmaris longus</li>- +<li>palmaris longus profundus muscle</li>
- +<li>aberrant palmaris longus muscle</li>
-<li><a href="/articles/accessory-flexor-digitorum-superficialis-indicis-muscle">accessory flexor digitorum superficialis indicis</a></li>-<li>flexor indices profundus</li>-<li><a href="/articles/flexor-carpi-radialis-brevis-vel-profundus">flexor carpi radialis vel profundus</a></li>- +<li><a href="/articles/accessory-flexor-digitorum-superficialis-indicis-muscle">accessory flexor digitorum superficialis indicis muscle</a></li>
- +<li>flexor indicis profundus muscle</li>
- +<li><a href="/articles/flexor-carpi-radialis-brevis-vel-profundus">flexor carpi radialis vel profundus muscle</a></li>
-<a href="/articles/gantzer-muscle-2">accessory head of the flexor pollicis longus</a> (common)</li>- +<a href="/articles/gantzer-muscle-2">accessory head of the flexor pollicis longus muscle</a> (common)</li>
-<a href="/articles/accessory-abductor-digiti-minimi-muscle-hand">accessory abductor digiti minimi</a> (common)</li>-<li><a href="/articles/accessory-flexor-carpi-ulnaris-muscle">accessory flexor carpi ulnaris</a></li>- +<a href="/articles/accessory-abductor-digiti-minimi-muscle-hand">accessory abductor digiti minimi muscle</a> (common)</li>
- +<li><a href="/articles/accessory-flexor-carpi-ulnaris-muscle">accessory flexor carpi ulnaris muscle</a></li>
-<li><a 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 muscle</a></li>
-<a href="/articles/extensor-digitorum-brevis-manus-muscle">extensor digitorum brevis manus</a> (rare)</li>- +<a href="/articles/extensor-digitorum-brevis-manus-muscle">extensor digitorum brevis manus muscle</a> (rare)</li>
-<li>nerve compression syndromes</li>- +<li><a title="Nerve compression syndromes" href="/articles/nerve-compression-syndrome">nerve compression syndromes</a></li>
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