Which muscle originates from the lateral supracondylar ridge of the humerus?

Which muscle originates from the lateral supracondylar ridge of the humerus?

• A. Brachioradialis
• B. Triceps brachii
• C. Biceps brachii
• D. Flexor carpi radialis

Answer: (A)

The lateral supracondylar ridge of the humerus is the origin for the brachioradialis. This muscle stretches down to the distal radius and crosses the elbow, where its primary job is to flex the elbow, especially when the forearm is in a mid-pronated position. It’s innervated by the radial nerve, which helps you connect the landmark to its nerve supply and action. The other muscles come from different parts of the humerus or from the scapula, so they don’t originate from that ridge: the triceps brachii starts from the infraglenoid tubercle and posterior humerus; the biceps brachii from the coracoid process and supraglenoid tubercle; the flexor carpi radialis from the medial epicondyle.

The lateral supracondylar ridge of the humerus is the origin for the brachioradialis. This muscle stretches down to the distal radius and crosses the elbow, where its primary job is to flex the elbow, especially when the forearm is in a mid-pronated position. It’s innervated by the radial nerve, which helps you connect the landmark to its nerve supply and action.

The other muscles come from different parts of the humerus or from the scapula, so they don’t originate from that ridge: the triceps brachii starts from the infraglenoid tubercle and posterior humerus; the biceps brachii from the coracoid process and supraglenoid tubercle; the flexor carpi radialis from the medial epicondyle.