Intertubercular groove (sulcus)

Definition

The intertubercular groove, also known as the sulcus, is a long, narrow depression located on the humerus bone of the upper arm. It serves as a pathway for the tendon of the long head of the biceps brachii muscle to attach to the scapula.

Related terms

Humerus: The long bone in the upper arm that runs from shoulder to elbow, providing structural support and attachment points for various muscles.

Biceps Brachii: A major muscle of the upper arm that flexes and supinates (rotates) the forearm, with one of its tendons running through the intertubercular groove.

Scapula: The shoulder blade; a flat triangular bone located on the posterior side of the ribcage that provides attachment points for multiple muscles including those connecting via the humerus