Which muscle originates at the medial epicondyle of the humerus?

Which muscle originates at the medial epicondyle of the humerus?

• A. Extensor Digitorum
• B. Flexor Carpi Ulnaris
• C. Extensor Carpi Radialis Longus
• D. External Oblique

Answer: (B)

Wrist flexors often start from the medial epicondyle of the humerus via the common flexor tendon, so that region marks the origin for several forearm flexors. Flexor carpi ulnaris specifically arises from the medial epicondyle (and the adjacent ulna) through that tendon and inserts on the pisiform, hook of the hamate, and base of the 5th metacarpal. This positions it as a primary wrist flexor with ulnar deviation. In contrast, extensor digitorum and extensor carpi radialis longus originate from the lateral side of the humerus (lateral epicondyle or nearby ridge) and act as wrist or finger extensors, while the external oblique is a trunk muscle with no humeral origin. Therefore, the muscle originating at the medial epicondyle is flexor carpi ulnaris.

Wrist flexors often start from the medial epicondyle of the humerus via the common flexor tendon, so that region marks the origin for several forearm flexors. Flexor carpi ulnaris specifically arises from the medial epicondyle (and the adjacent ulna) through that tendon and inserts on the pisiform, hook of the hamate, and base of the 5th metacarpal. This positions it as a primary wrist flexor with ulnar deviation. In contrast, extensor digitorum and extensor carpi radialis longus originate from the lateral side of the humerus (lateral epicondyle or nearby ridge) and act as wrist or finger extensors, while the external oblique is a trunk muscle with no humeral origin. Therefore, the muscle originating at the medial epicondyle is flexor carpi ulnaris.