Human Anatomy: Forearm and Hand Bones

The lateral bone of the forearm, containing a head, shaft, and distal end.

The medial bone of the forearm, including a large proximal end, shaft, and a smaller distal end.

The concave upper surface of the radius that articulates with the humerus at the elbow joint.

A roughened area on the anteromedial aspect of the radius that serves as the insertion point for the biceps muscle.

A sharp medial border of the radius that provides attachment for the interosseous membrane.

A small bump on the lateral side of the radius for the insertion of the pronator teres muscle.

A shallow depression on the medial aspect of the distal end of the radius that articulates with the head of the ulna.

The distal surface of the radius that articulates with the scaphoid and lunate bones of the wrist.

A projection from the lateral margin of the distal end of the radius that extends laterally to the carpal bones.

A small tubercle on the dorsal aspect of the radius that provides a groove for the tendon of the extensor pollicis longus muscle.

The prominent tip of the olecranon process that fits into the olecranon fossa of the humerus when the elbow is extended.

A large, crescent-shaped notch on the anterior aspect of the proximal end of the ulna that articulates with the trochlea of the humerus.

A projection on the anterior aspect of the proximal end of the ulna that contributes to the formation of the trochlear notch.

A shallow notch on the lateral aspect of the coronoid process that articulates with the head of the radius.

A roughened area on the anterior, distal aspect of the coronoid process that serves as the insertion point for the brachialis muscle.

The posterior border of the ulna, which is rounded and subcutaneous.

The sharp lateral border of the ulna that provides attachment for the interosseous membrane.

A crest below the radial notch of the ulna that gives origin to the supinator muscle.

The small, rounded distal end of the ulna that articulates with the ulnar notch of the radius.

A small projection from the medial aspect of the distal end of the ulna.

A strong fibrous sheet that connects the radius and ulna, allowing them to rotate together.

The eight bones of the wrist, arranged in two rows of four.

The largest of the carpal bones, boat-shaped and located in the proximal row.

A crescent-shaped carpal bone in the proximal row, known for its potential to dislocate.

A pyramidal-shaped carpal bone in the proximal row, situated medial to the lunate.

The smallest carpal bone, pear-shaped and located anterior to the triquetrum.

A four-sided carpal bone in the distal row, forming a saddle joint with the 1st metacarpal bone.

A small, trapezoid-shaped carpal bone in the distal row.

The largest of the carpal bones, located centrally in the distal row.

A carpal bone in the distal row with a hook-like projection.

The head of the radius is the rounded, proximal end that articulates with the humerus at the elbow joint. It also articulates with the ulna at the proximal radioulnar joint.

The bicipital tuberosity is a roughened area on the radius's anteromedial side, where the biceps muscle inserts.

The interosseous membrane is a strong sheet of tissue that connects the radius and ulna, providing stability and allowing for rotation.

The pronator tubercle is a small bump on the lateral side of the radius where the pronator teres muscle attaches. This muscle helps in rotating the forearm.

The distal end of the radius has a shallow depression called the ulnar notch, which articulates with the head of the ulna at the distal radioulnar joint.

A strong, fibrous band that holds the tendons of the flexor muscles of the fingers and the median nerve in place.

A narrow passageway formed by the carpal bones and the flexor retinaculum, through which the median nerve and flexor tendons pass.

The five long bones in the hand, located between the carpal bones and phalanges.

The fourteen bones that make up the fingers and thumb. Each finger has three phalanges (proximal, middle, and distal), while the thumb only has two.

The joint formed by the articulation of the scaphoid, lunate, and distal end of the radius.

The large, hook-shaped proximal end of the ulna that forms the bony prominence of the elbow.

A large, crescent-shaped notch on the anterior aspect of the proximal ulna that articulates with the trochlea of the humerus at the elbow joint.

A shallow, smooth notch on the lateral side of the coronoid process of the ulna that articulates with the head of the radius at the proximal radioulnar joint.

A strong fibrous sheet that connects the radius and ulna to their interosseous borders, allowing them to rotate together.

The eight bones of the wrist, arranged in two rows of four.

The largest of the carpal bones, boat-shaped and located in the proximal row.

A crescent-shaped carpal bone in the proximal row, known for its potential to dislocate.

A small, trapezoid-shaped carpal bone in the distal row.

The largest of the carpal bones, located centrally in the distal row.

A carpal bone in the distal row with a hook-like projection.