Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The ulnar tuberosity is a bony prominence found on the proximal end of the ulna, one of the two long bones in the forearm. It serves as an attachment point for the brachialis muscle, which plays a key role in flexing the elbow.
The longer and larger bone of the forearm that runs parallel to the radius and houses structures such as the ulnar tuberosity.
Brachialis muscle: A major muscle in the upper arm that flexes the elbow joint, attaching primarily to the ulnar tuberosity.
Elbow joint: A hinge type synovial joint formed by three bones - the humerus of the upper arm, and the paired radius and ulna of the forearm, enabling movements like flexion and extension