What Is the Flexor Carpi Ulnaris?
The flexor carpi ulnaris is a muscle located in the forearm. Its main action is to help adduct the wrist or hand, and it is used for many different daily activities. The secondary action of the muscle is to help another muscle, the extensor carpi ulnaris, twist and deviate the wrist. An example of an action that would use the muscle in everyday life is pulling a rope toward the body. The origin of the muscle is on the medial side of the humerus. From there it runs all the way down the forearm before attaching to the fifth metacarpal. There are actually two heads to the flexor carpi ulnaris — the humeral and ulnar. The ulnar head of the muscle originates in a different location to the humerus.
