|Origin||Medial epicondyle of the humerus|
|Insertion||Bases of the second and third metacarpal bones|
|Action||Flexion of the wrist joint|
Abduction of the wrist joint
|Nerve||Median nerve (C6-C7)|
Posterior branch of the ulnar recurrent artery
Location & Overview
The flexor carpi radialis as a superficial muscle located in the forearm. It is a long and relatively thin muscle running just laterally of flexor digitorum superficialis. It connects the humerus to the metacarpals in the hands. Its visibility from the skin’s surface is more pronounced during wrist flexion. It is one of four muscles in the superficial layer of the anterior compartment of the forearm. The other three are: the palmaris longus, flexor carpi ulnaris, and the pronator teres .
Origin & Insertion
The flexor carpi radialis originates on the medial epicondyle of the humerus. It then travels down towards the lateral side of the forearm. Once it reaches the wrist, its tendon then continues downwards to insert at the bases of the second and third metacarpal bones    .
The main function of the flexor carpi radialis is to perform flexion at the wrist joint. It also plays an assistive role in performing abduction of the hand and wrist  .
Innervation of the flexor carpi radialis is provided by the median nerve (C6-C7) .
Blood is supplied to the flexor carpi radialis via the radial artery and the posterior branch of the ulnar recurrent artery  .
Want some flashcards to help you remember this information? Then click the link below:
Flexor Carpi Radialis Flashcards
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|↑1, ↑3, ↑6, ↑8, ↑10||Moore KL, Agur AMR, Dalley AF. Clinically Oriented Anatomy. 8th ed. Philadelphia: Lippincot Williams & Wilkins; 2017.|
|↑2||Schmidt HM. Clinical anatomy of the m. flexor carpi radialis tendon sheath. Acta Morphol Neerl Scand. 1987;25(1):17-28. PMID: 2449801.|
|↑4||Irie, T., Motomiya, M. & Iwasaki, N. Absence of flexor carpi radialis identified during volar approach for fixation of distal radius fracture: a case report. BMC Res Notes 11, 240 (2018). https://doi.org/10.1186/s13104-018-3348-z|
|↑5, ↑7||Kanevsky J, Zammit D, Brutus JP. Rupture of the flexor carpi radialis tendon secondary to trauma: case report and literature review. Plast Aesthet Res 2015;2:138-9. http://dx.doi.org/10.4103/2347-9264.157108|
|↑9||Standring S, Ellis H, Healy J, Johnson D, Williams A, Collins P, Wigley C. Gray’s anatomy: the anatomical basis of clinical practice. American journal of neuroradiology. 2005 Nov;26(10):2703)|