Tuberosity of the Radius

The radial tuberosity is a bony protrusion on the surface of the radius, which is located at its proximal end and serves for muscle attachment. The tuberosity has the shape of a crescent and consists of three tubercles, each of which has its own name:

– Lateral border tubercle – located on the lateral side of the radius and serves to attach the muscles that flex the arm at the elbow joint.
– Medial tubercle - located on the medial side of the radius and also serves to attach the flexor muscles.
– The Anular tubercle is a small protrusion on the back of the radius where the tendon of the muscle that extends the arm at the elbow joint is attached.

The tuberosity is an important anatomical structure as it plays an important role in the movement of the arm. For example, when the arm flexes at the elbow, the muscles attached to the tubercle of the lateral border exert pressure on the radii, causing the arm to flex. The tuberosity also plays a role in stabilizing the elbow joint, ensuring the correct position of the bones when flexing and extending the arm.

Overall, the radial tuberosity is an important anatomical element that is necessary for the proper functioning of the arm and elbow joint.