Radial styloid process
Encyclopedia
The radial styloid process is a projection of bone
on the lateral surface of the distal radius bone
. It extends obliquely downward into a strong, conical projection. The tendon of the brachioradialis
attaches at its base, and the radial collateral ligament
of the wrist
attaches at its apex. The lateral surface is marked by a flat groove for the tendons of the Abductor pollicis longus and Extensor pollicis brevis.
Breakage of the radius at the radial styloid is known as a Chauffeur's fracture
; it is typically caused by compression of the scaphoid bone of the hand against the styloid.
Bone
Bones are rigid organs that constitute part of the endoskeleton of vertebrates. They support, and protect the various organs of the body, produce red and white blood cells and store minerals. Bone tissue is a type of dense connective tissue...
on the lateral surface of the distal radius bone
Radius (bone)
The radius is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna, which exceeds it in length and size. It is a long bone, prism-shaped and slightly curved longitudinally...
. It extends obliquely downward into a strong, conical projection. The tendon of the brachioradialis
Brachioradialis
Brachioradialis is a muscle of the forearm that acts to flex the forearm at the elbow. It is also capable of both pronation and supination, depending on the position of the forearm...
attaches at its base, and the radial collateral ligament
Radial collateral ligament (thumb)
The radial collateral ligament of the thumb extends from the first metacarpal head to the proximal phalanx of the thumb. It is located on the radial side of the joint and is weaker than the ulnar collateral ligament of the thumb....
of the wrist
Wrist
In human anatomy, the wrist is variously defined as 1) the carpus or carpal bones, the complex of eight bones forming the proximal skeletal segment of the hand;...
attaches at its apex. The lateral surface is marked by a flat groove for the tendons of the Abductor pollicis longus and Extensor pollicis brevis.
Breakage of the radius at the radial styloid is known as a Chauffeur's fracture
Chauffeur's fracture
Chauffeur's fracture is a type of fracture of the forearm, specifically the radial styloid process. The injury is typically caused by compression of the scaphoid bone of the hand against the styloid process of the distal radius. It can be caused by falling onto an outstretched hand...
; it is typically caused by compression of the scaphoid bone of the hand against the styloid.