Wrist joint
Wrist Joint
The Wrist Joint (pronounced: /ˈrɪst dʒɔɪnt/), also known as the radiocarpal joint, is a complex joint in the human body that connects the forearm to the hand. It is a synovial joint, a type of joint that is surrounded by a thick flexible membrane forming a sac into which is secreted a viscous fluid that allows a varying degree of movement.
Etymology
The term "wrist" is derived from the Old English word "wrist", which means "to twist". "Joint" comes from the Latin "iunctus", meaning "joined".
Anatomy
The wrist joint is formed by the distal end of the radius and the articular disc of the distal radioulnar joint proximally and the proximal row of carpal bones distally. The carpal bones involved in the wrist joint are the scaphoid, lunate, and triquetrum.
Function
The wrist joint allows for two types of movements: flexion and extension, and abduction and adduction. These movements allow the hand to move up (dorsiflexion), down (palmar flexion), side to side (radial and ulnar deviation), and combinations of these movements.
Related Terms
- Carpal Bones
- Radius
- Ulna
- Articular Disc
- Synovial Joint
- Dorsiflexion
- Palmar Flexion
- Radial Deviation
- Ulnar Deviation
External links
- Medical encyclopedia article on Wrist joint
- Wikipedia's article - Wrist joint
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