The video tutorial discusses the teres major muscle, highlighting its origin, insertion, innervation, and function. Unlike the teres minor, the teres major is not part of the rotator cuff. It originates from the scapula and inserts at the humerus, working closely with the latissimus dorsi. The muscle is innervated by the lower scapular or thoracodorsal nerve. It facilitates medial rotation, adduction, and retroversion of the humerus, and can cause scapular rotation.

Describe the relationship between the teres major muscle and the latissimus dorsi muscle.

Which nerves supply the innervation of the teres major muscle?