Radius and Ulna

Head of radius

a disc-shaped, upper bone portion of the radius

Neck of radius

the short, narrowed section of the radius bone located just below the disk-shaped radial head and right above the radial tuberosity

Radial tuberosity

a small, rough bony prominence on the medial side of the upper radius bone in the forearm, just below the neck.

Radial styloid process

a pointed, cone-shaped bony projection located on the lateral side of the lower radius bone at the wrist.

Radius

one of the two long bones in the forearm, running from the lateral side of the elbow to the thumb side of the wrist.

Ulna

the longer of the two long bones in the forearm, running parallel to the radius from the elbow to the wrist on the pinkie medial side.

Coronoid process

a triangular bony projection on the upper, front part of the ulna bone in the forearm

Olecranon process

The large, curved, bony projection at the upper, back end of the ulna.

Trochlear notch

a large, C-shaped depression at the proximal end of the ulna bone

Radial notch

a small, smooth, concave depression located on the lateral side of the coronoid process of the ulna

Head of ulna

The ulna head is the rounded distal end of the ulna.

Ulnar Styloid process

a small, bony projection located on the medial side of the wrist at the lower end of the ulna bone.