The Rotator Cuff Muscles

Question

The rotator cuff muscles
A) stabilize the shoulder joint.
B) include the biceps femoris, semitendinosus, and semimembranosus.
C) attach the radius and ulna to the humerus.
D) include the quadriceps femoris, vastus lateralis, and vastus medialis.

Accepted Answer

The rotator cuff muscles are a group of four muscles (supraspinatus, infraspinatus, teres minor, and subscapularis) that originate from the scapula and insert into the humerus. Their primary function is to stabilize the shoulder joint, particularly during movements that involve overhead reaching or rotation of the arm. Choices B, C, and D are incorrect because they describe other muscles or attachments that are not related to the rotator cuff.