Correct option is D
The rotator cuff is a group of four muscles and their associated tendons that stabilize the shoulder joint and allow various movements of the arm. These muscles converge around the head of the humerus to form a protective "cuff."
1. Subscapularis (A): Located on the anterior surface of the scapula, it is responsible for internal rotation of the shoulder.
2. Teres Minor (B): Located on the posterior scapula, it contributes to external rotation of the shoulder.
3. Supraspinatus (C): Positioned above the scapular spine, it initiates abduction of the shoulder.
4. Infraspinatus (E): Located below the scapular spine, it aids in external rotation of the shoulder.
Lattissimus Dorsi (D): While important in shoulder movement (adduction, extension, and internal rotation), it is not part of the rotator cuff.
Correct Answer:
(d) A, B, C, E only
Information Booster 1. Functions of the Rotator Cuff:
· Stabilizes the shoulder joint during movement.
· Facilitates arm rotation and abduction.
2. Common Injuries:
· Rotator cuff tears: Often due to repetitive overhead activities.
· Tendinitis: Caused by overuse or inflammation of the tendons.
3. Strengthening Exercises:
· External and internal rotation exercises.
· Shoulder abduction and stability drills.