Final answer:
The anterior muscles of the rotator cuff, such as the biceps brachii and brachialis, allow for flexion of the arm and the ability to point the palm of the hand towards the body while flexing. These muscles are important for actions like throwing a fast pitch in baseball. The rotator cuff is a strong connective tissue structure that supports various sides of the humeral head in the shoulder joint.
Step-by-step explanation:
The anterior muscles of the rotator cuff are responsible for flexion of the arm and allow the palm of the hand to point towards the body while flexing. They include the biceps brachii, brachialis, pronator teres, and brachioradialis. These muscles play a crucial role in activities such as throwing a fast pitch in baseball. The rotator cuff itself is a strong connective tissue structure formed by the fusion of four rotator cuff muscle tendons to the articular capsule of the shoulder joint. It surrounds and supports the superior, anterior, lateral, and posterior sides of the humeral head.