The rotator cuff muscles:
Supraspinatus
Infraspinatus
Teres Minor
Supscapularis
Easily remembered as SITS.
lateral epicondyle of the humerus
The main antagonist of medial rotation of the humerus is the infraspinatus muscle, one of the rotator cuff muscles. It works in opposition to the muscles that perform medial rotation, such as the subscapularis.
The extrensic muscles of the hand originate from the lateral epicondyle of the humerous
The deltoid tuberosity.
The ridge of bony tissue proximal to the lateral condyle of the humerus is called the lateral supracondylar ridge. It serves as a point of attachment for various muscles and ligaments in the arm.
The muscles involved in the external rotation of the shoulder are primarily the Infraspinatus and Teres Minor muscles.
The muscles involved in shoulder external rotation are the Infraspinatus and Teres Minor.
Flexion, abduction, and lateral rotation at the hip, and flexion and medial rotation at the knee.
Muscles involved in chewing are the masseteres, temporalis, and medial and lateral pterygoids.
The rotator cuff muscles are referred to occasionally as the SITS muscles. The Supraspinatus, Infraspinatus, Teres minor and the subscapularis. The Supras. originates on the scapula and inserts on the humerus. The Infras. originates on the scapula and inserts on the humerus(greater tubercle. The Teres minor originates on the scapula and inserts on the humerus. The Subscapularis originates on the scapula and inserts on the humerus(lesser tubercle). The function of this muscle group is to stabilize the shoulder joint. Hope this helps.
The humerus is lateral to the sternum. The sternum, or breastbone, is midline.
The major muscle that abducts the humerus is the Deltoid. (all muscles move in conjuction, there may be more muscles that contribute to the abduction of the humerus) pectoralis major and latissimus dorsi