Flexor Carpi Ulnaris

Musculus flexor carpi ulnaris

Upper Body ArmsForearms

Flexor carpi ulnaris is the most medial of the superficial flexors, flexing the wrist and pulling the hand toward the little-finger side (ulnar deviation). It is the only wrist flexor innervated by the ulnar nerve and provides a strong anchor for grip and forceful wrist flexion in pulling and carrying. It is loaded by wrist curls and any heavy gripping where the wrist resists radial deviation.

Actions

Wrist flexion, Wrist ulnar deviation (adduction)

Origin

Humeral head from the medial epicondyle via the common flexor tendon; ulnar head from the olecranon and posterior border of the ulna

Insertion

Pisiform bone, then via the pisohamate and pisometacarpal ligaments to the hook of hamate and base of the fifth metacarpal

Innervation

Ulnar nerve (C8, T1)

Blood supply

Ulnar artery (posterior ulnar recurrent and ulnar branches)

Heads

Humeral head, Ulnar head

Wikipedia ↗

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