Forearm Anatomy Quiz - Anatomy 2024/2025

The flexor pollicis longus is a muscle that flexes all the joints of the thumb. It originates from the anterior surface of the radius and inserts into the base of the distal phalanx of the thumb.

The flexor digitorum profundus muscle flexes all joints of the medial four fingers (index, middle, ring, and little). It originates from the anterior and medial surface of the ulna and inserts into the bases of the distal phalanges of these fingers.

The flexor digitorum profundus tendon passes through the carpal tunnel, deep to the tendons of the flexor digitorum superficialis. It then diverges in the palm to reach each finger. Each tendon is attached to the base of the terminal phalanx by a fibrous band called a vinculum.

The anterior interosseous branch of the median nerve supplies the flexor pollicis longus and the flexor digitorum profundus.

The pronator quadratus is a muscle that pronates the forearm, helping to rotate the hand so the palm faces down.

The pronator quadratus originates on the lower portion of the anterior surface of the ulna and inserts onto the lower portion of the anterior surface of the radius.

The pronator quadratus is also responsible for binding the radius to the ulna, helps to keep the two bones together in the lower forearm.

The anterior interosseous branch of the median nerve supplies the pronator quadratus.

A muscle in the forearm responsible for flexing and adducting the hand at the wrist joint. It inserts into the pisiform bone and extends through two ligaments to the hamate and 5th metacarpal bone.

A superficial muscle in the forearm that flexes the middle and proximal phalanges of the middle four fingers. It originates from the medial epicondyle of the humerus and the radius.

The tendons of the Flexor Digitorum Superficialis are arranged in the carpal tunnel so that the tendons for the middle and ring fingers are superficial to the tendons for the index and little fingers.

A deep muscle in the forearm responsible for flexing the distal phalanges of the index, middle, ring, and little fingers. It originates from the ulna and inserts into the distal phalanges of the corresponding fingers.

A muscle in the forearm responsible for flexing the thumb. It originates from the radius and inserts into the distal phalanx of the thumb.

A muscle in the forearm responsible for pronating the hand. It originates from the ulna and inserts into the radius.

This muscle acts as a flexor of the hand at the wrist, working alongside other muscles to achieve the movement.

The ulnar nerve lies deep to the Flexor Carpi Ulnaris in the upper 2/3 of the forearm, then moves to the lateral side of the muscle's tendon in the lower 1/3 where it becomes superficial.

Pronator teres is a muscle in the forearm that helps turn the palm downward (pronation). It originates from two heads: one from the medial epicondyle of the humerus and the other from the coronoid process of the ulna. It inserts on the lateral surface of the radius.

The flexor carpi radialis is a muscle in the forearm that helps flex and abduct (move away from the midline) the hand at the wrist. It originates from the medial epicondyle of the humerus and inserts onto the second and third metacarpal bones.

The palmaris longus is a muscle in the forearm that assists in flexing the hand at the wrist. This muscle is not present in all individuals. It originates from the medial epicondyle of the humerus and inserts onto the palmar aponeurosis.

The flexor digitorum superficialis is a muscle in the forearm that assists in flexing the middle phalanges of the fingers (except the thumb). It originates from the medial epicondyle of the humerus and inserts onto the middle phalanges of the 2nd to 5th fingers.

The flexor carpi ulnaris is a muscle in the forearm that helps flex and adduct (move your hand toward the pinky) the hand at the wrist. It originates from the medial epicondyle of the humerus and inserts onto the pisiform bone of the wrist.

The median nerve, a major nerve in the forearm, travels between the two heads of the pronator teres muscle. The ulnar head of the pronator teres is located deeper, separating the median nerve from the ulnar artery.

The actions of the flexor carpi radialis include flexing and abducting the hand at the wrist.

The flexor carpi ulnaris has two origins: one from the medial epicondyle of the humerus and the other from the medial margin of the olecranon and the posterior border of the ulna. Its insertion is onto the pisiform bone and the base of the 5th metacarpal bone.