Wrist and Distal Radioulnar Joints

Flashcards covering key concepts related to the wrist and distal radioulnar joints, including definitions of important structures and functions.

Distal Radioulnar Joint

The joint formed between the convex distal head of the ulna and the concave ulnar notch of the radius, including a triangular fibrocartilaginous articular disc.

Triangular Fibrocartilage Complex (TFCC)

A structure in the wrist providing stability and support, made of components like the ulnar collateral ligament and several ligaments associated with the ulnar side.

Uniaxial Joint

A type of joint that allows movement around only one axis, specifically allowing pronation and supination in the distal radioulnar joint.

Palmar Radiocarpal Ligament

A ligament located on the palmar side of the wrist joint that connects the radius to the carpal bones and contributes to wrist stability.

Dorsal Radiocarpal Ligament

A ligament on the dorsal side of the wrist joint that helps maintain stability and prevents excessive flexion.

Innervation of the Distal Radioulnar Joint

The joint is innervated by branches of the anterior median nerve and posterior interosseous nerves.

Wrist Joint (Radiocarpal Joint)

A synovial joint formed between the radius and the three proximal carpal bones, primarily the scaphoid, lunate, and triquetral bones.

Articular Capsule

The structure that encapsulates the wrist joint, composed of fibrous connective tissue and a synovial membrane.

Flexor Muscles of the Wrist

Muscles such as flexor carpi ulnaris and flexor carpi radialis responsible for wrist flexion.

Supination

The movement at the distal radioulnar joint that rotates the forearm in the opposite direction of pronation, primarily facilitated by the supinator muscle.