Flexor carpi ulnaris muscle

Flexor carpi ulnaris muscle
origin
Head humerale : humerus ( epicondylus medialis ) Caput ulnare : posterior surface of the ulna
approach
Os pisiform, Os hamatum, Os metacarpale V
function
Wrist flexion, ulnar abduction
Innervation
Ulnar nerve from the brachial plexus
Spinal segments
C8, Th1

The flexor carpi ulnaris muscle ( Latin for "elbow-sided hand flexor " or "ulnar hand flexor ") is a skeletal muscle and one of the superficial flexors on the forearm . It is the main muscle for the arteria , vena and the ulnar nerve . The insertion tendon can be easily felt proximal to the pea bone (os pisiforme) because it does not pass through the carpal tunnel .

The muscle has two origins and thus two muscle heads

• Caput humerale ( lat .: Humerus head)
• Caput ulnare (Ellenkopf)

The muscle is innervated by the ulnar nerve.

function

The flexor carpi ulnaris muscle flexes the hand in the wrist . In humans, however, it mainly performs ulnar abduction (bending of the hand in the direction of the little finger).

The muscle can be strengthened through certain exercises. One can use a wrist roller or do flexion exercises with the wrist. These exercises prevent injuries to the outer ligament of the elbow joint ( ligamentum collaterale ulnare ).

clinic

If the muscle is enlarged as a result of increased stress, a compression syndrome can occur if the ulnar nerve is depressed, as it passes between the two origins of the medial epicondyle and olecranon ( cubital tunnel syndrome )