Wrist joint

The main function of the wrist joint is to provide a versatile range of movement that is essential for everyday tasks. Its unique configuration allows for flexion and extension, which are movements that enable the hand to bend forward and backward. Additionally, the wrist supports radial and ulnar deviation, allowing the hand to move side to side. This multidimensional movement is crucial for grasping objects, writing, and other manual operations. The wrist also plays a key role in distributing loads and stresses from the hand and forearm during activities such as lifting and throwing, thereby protecting the delicate structures of the hand from excessive strain.

The wrist joint is located at the distal end of the radius and ulna, the two long bones in the forearm. It is situated just above the hand, where it connects to the eight carpal bones arranged in two rows. The proximal row consists of the scaphoid, lunate, triquetrum, and pisiform bones, while the distal row includes the trapezium, trapezoid, capitate, and hamate bones. This complex arrangement can be found on the volar side of the arm, aligned with the palmar surface of the hand. Its proximity to the forearm and hand allows for seamless transition of motions and a significant joint area that accommodates the mechanical demands placed upon it.

• The wrist joint can perform over a dozen different movements, making it one of the most versatile joints in the body.
• Injuries to the wrist, such as sprains or fractures, are common due to its frequent use and exposure during physical activities.
• The wrist contains the carpal tunnel, a narrow passageway that houses the median nerve, which controls sensation and movement in parts of the hand.