Lesser tubercle

Definition

The lesser tubercle is a small, rounded protrusion found on the humerus (the bone of the upper arm), specifically located on the anterior (front) side. It serves as an attachment site for one of the muscles of the rotator cuff, the subscapularis muscle.

Related terms

Humerus:

The long bone in the upper arm that runs from the shoulder to the elbow.

Rotator Cuff: A group of four muscles and their tendons that surround the shoulder joint to provide it stability and facilitate movement.

Subscapularis Muscle: A muscle of the upper limb that attaches to the lesser tubercle of the humerus and plays a crucial role in medially rotating the arm at the shoulder