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October 1982

The Innervation of Flexor Carpi Radialis: An Interfascicular Dissection

Author Affiliations

From the Microsurgery Research Laboratory, Department of Orthopaedics, University of Iowa Hospitals and Clinics (Dr Blair), and the College of Medicine, University of Iowa (Ms Joos), Iowa City.

Arch Neurol. 1982;39(10):647-649. doi:10.1001/archneur.1982.00510220045010

• Comparative gross dissection and microdissection of the nerve branch to flexor carpi radialis in 20 fresh-frozen cadaveric forearms was completed, with attention to the nerve's origin. By gross dissection a single branch arose from the main trunk, and in one specimen branches to flexor carpi radialis arose from both the anterior interosseous nerve and the median nerve. Interfascicular dissection modified this observation, demonstrating two patterns of interfascicular innervation of flexor carpi radialis. The patterns were (1) a single branch from median nerve to flexor carpi radialis with no contributions from the anterior interosseous nerve (eight forearms), and (2) a branch from both anterior interosseous nerve and median nerve combining to innervate flexor carpi radialis (12 forearms).

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