Radius (bone)

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Radius (bone)

The radius is one of the two large bones of the forearm, the other being the ulna. It extends from the elbow to the wrist and runs parallel to the ulna, which exceeds it in length and size. The radius is part of the skeletal system and is involved in many tasks, including supporting the arm, enabling wrist movement, and transmitting forces from the hand to the elbow.

Structure[edit | edit source]

The radius is a long bone, cylindrical in shape and slightly curved longitudinally. It has a body and two extremities. The upper extremity of the radius, or head, is disc-shaped and articulates with the humerus and ulna. The lower extremity includes the ulnar notch and the carpal articular surface, which articulates with the carpal bones of the wrist.

Function[edit | edit source]

The radius serves several functions. It forms the bony structure of the forearm, along with the ulna. It also provides attachment points for muscles, including the biceps and the supinator muscle. The radius also allows for the rotation of the forearm, thanks to the pronator teres muscle and the pronator quadratus muscle.

Clinical significance[edit | edit source]

Injuries to the radius can include fractures, dislocations, and osteoporosis. The most common type of radius fracture is a Colles' fracture, which occurs near the wrist. Treatment for radius injuries can include casting, surgery, and physical therapy.

See also[edit | edit source]

References[edit | edit source]

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Radius (bone)[edit | edit source]

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