Final answer:
The muscles responsible for internal rotation at the GHJ include the subscapularis, pectoralis major, deltoid, and latissimus dorsi.
Step-by-step explanation:
The muscles responsible for internal rotation at the glenohumeral joint (GHJ) include the subscapularis, pectoralis major, deltoid, and latissimus dorsi. The muscles responsible for internal rotation at the GHJ include the subscapularis, pectoralis major, deltoid, and latissimus dorsi.
The subscapularis is located on the anterior side of the shoulder and is the primary internal rotator of the GHJ. The pectoralis major, deltoid, and latissimus dorsi also play a role in internal rotation depending on the position of the shoulder.
For example, when the shoulder is in a neutral position, the subscapularis is the main muscle responsible for internal rotation. However, if the arm is elevated, the deltoid and pectoralis major also contribute to internal rotation.