Flexor digitorum superficialis muscle

Changed by Craig Hacking, 2 Aug 2016

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Flexor digitorum superficialis (FDS) is a muscle in the secondlayer of of the anterior compartment of the forearm that splits into four tendons, passes under the flexor ~~retinaculum~~ retinaculum and through the carpal tunnel, to insert into the middle phalanx of the 2nd-4th digits.

Summary

origin
- humeroulnar ~~head~~ head: medial epicondyle of the humerus andcoronoid process of the ulna
- radial head: diaphysis of the radius
insertion: via four tendons into the volar aspect of the middle phalanges of digits 2-4 (index, middle, ring and little fingers)
innervation: median nerve (C7-T1)
action: flexion of the proximal interphalangel joint

-<p><strong>Flexor digitorum superficialis (FDS)</strong> is a muscle in the second<sup> </sup>layer of the anterior compartment of the <a href="/articles/forearm">forearm</a> that splits into four tendons, passes under the <a href="/articles/flexor-retinaculum">flexor retinaculum</a> and through the <a href="/articles/carpal-tunnel">carpal tunnel</a>, to insert into the middle phalanx of the 2nd-4th digits. </p><h4>Summary</h4><ul>
+<p><strong>Flexor digitorum superficialis (FDS)</strong> is a muscle in the second<sup> </sup>layer of the anterior compartment of the <a href="/articles/forearm">forearm</a> that splits into four tendons, passes under the <a href="/articles/flexor-retinaculum">flexor retinaculum</a> and through the <a href="/articles/carpal-tunnel">carpal tunnel</a>, to insert into the middle phalanx of the 2nd-4th digits. </p><h4>Summary</h4><ul>
~~-<li>humeroulnar head: medial epicondyle of the <a href="/articles/humerus">humerus </a> and <a href="/articles/humerus">coronoid process of the </a><a href="/articles/ulna">ulna</a>~~
+<li>humeroulnar head: medial epicondyle of the <a href="/articles/humerus">humerus </a> and <a href="/articles/humerus">coronoid process of the </a><a href="/articles/ulna">ulna</a>