Which muscle inserts on the inferior facet of the greater tubercle?

Which muscle inserts on the inferior facet of the greater tubercle?

• A. Infraspinatus
• B. Subscapularis
• C. Teres minor
• D. Supraspinatus

Answer: (C)

The muscles of the rotator cuff attach to distinct facets on the greater tubercle of the humerus: supraspinatus to the superior facet, infraspinatus to the middle facet, and teres minor to the inferior facet. Subscapularis, meanwhile, inserts on the lesser tubercle. Therefore, the muscle that inserts on the inferior facet of the greater tubercle is the teres minor. This arrangement helps coordinate shoulder external rotation and stabilizes the joint.

The muscles of the rotator cuff attach to distinct facets on the greater tubercle of the humerus: supraspinatus to the superior facet, infraspinatus to the middle facet, and teres minor to the inferior facet. Subscapularis, meanwhile, inserts on the lesser tubercle. Therefore, the muscle that inserts on the inferior facet of the greater tubercle is the teres minor. This arrangement helps coordinate shoulder external rotation and stabilizes the joint.