Mastering the Muscles of the Shoulder: An Anatomy Quiz

The trapezius muscle is responsible for shrugging the shoulders by allowing movement of the scapula and upper back. The deltoid muscle is involved in shoulder abduction, the biceps muscle is in the arm, and the hamstring muscle is in the thigh.

The deltoid muscle is located in the shoulder and is responsible for various arm movements, such as lifting and rotating the arm.

The latissimus dorsi is the largest muscle in the human body, covering a large portion of the back. It is responsible for pulling the arms down and towards the body.

The levator scapulae muscle is responsible for elevating the scapula, while the deltoid, trapezius, and biceps brachii muscles are not primarily responsible for this movement.

Shoulder abduction is primarily performed by the supraspinatus muscle, which is one of the rotator cuff muscles. While deltoid, pectoralis major, and trapezius muscles are also involved in shoulder movements, they are not the primary muscle responsible for shoulder abduction.

The infraspinatus muscle is one of the four rotator cuff muscles and is specifically responsible for external rotation of the shoulder joint. The deltoid muscle is responsible for shoulder abduction, the pectoralis major muscle is responsible for shoulder flexion, and the trapezius muscle is responsible for shoulder elevation and retraction.

The teres minor muscle is one of the rotator cuff muscles that helps in the lateral rotation of the arm.

Shoulder extension is the movement of the arm backward, away from the body. The teres major muscle plays a significant role in this movement as it is responsible for the extension, adduction, and medial rotation of the shoulder joint.

The rhomboideus major is a muscle in the upper back that connects the scapula to the spine, aiding in shoulder movement and stability.