Ulnar notch of the radius
Encyclopedia
The articular surface for the ulna
is called the ulnar notch (sigmoid cavity) of the radius
; it is narrow, concave, smooth, and articulates with the head of the ulna.
Ulna
The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form and runs parallel to the radius, which is shorter and smaller. In anatomical position The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form...
is called the ulnar notch (sigmoid cavity) of the radius
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 is narrow, concave, smooth, and articulates with the head of the ulna.