Teres major inserts at which location on the humerus?

Teres major inserts at which location on the humerus?

• A. Lateral lip of intertubercular groove
• B. Greater tubercle
• C. Medial lip of intertubercular groove
• D. Deltoid tuberosity

Answer: (C)

Teres major attaches to the medial lip of the intertubercular (bicipital) groove on the humerus. This location sits along the inner edge of the groove as it runs between the tubercles, and it positions the tendon to help medially rotate and adduct the arm. The lateral lip of the groove is where the pectoralis major inserts, the floor of the groove is where the latissimus dorsi inserts, and the deltoid tuberosity is the attachment for the deltoid on the shaft of the humerus—so the medial lip is the correct site for teres major.

Teres major attaches to the medial lip of the intertubercular (bicipital) groove on the humerus. This location sits along the inner edge of the groove as it runs between the tubercles, and it positions the tendon to help medially rotate and adduct the arm. The lateral lip of the groove is where the pectoralis major inserts, the floor of the groove is where the latissimus dorsi inserts, and the deltoid tuberosity is the attachment for the deltoid on the shaft of the humerus—so the medial lip is the correct site for teres major.