<Tr> <Td_colspan="2"> Anatomical terms of muscle (edit on Wikidata) </Td> </Tr> <P> The flexor carpi ulnaris muscle (or FCU) is a muscle of the human forearm that acts to flex and adduct (medial deviation) the hand . </P> <P> Flexor carpi ulnaris muscle arises by two heads, humeral and ulnar, connected by a tendinous arch beneath which the ulnar nerve and artery pass . </P> <Ul> <Li> The humeral head arises from the medial epicondyle of the humerus by the common flexor tendon . </Li> <Li> The ulnar head arises from the medial margin of the olecranon of the ulna and from the upper two - thirds of the dorsal border of the ulna by an aponeurosis . </Li> </Ul>

What is the proximal attachment of the flexor carpi ulnaris in humans