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Rotator cuff

Synonym: rotator cup, rotor cuff
German: Rotatorenmanschette

1 Definition

The rotator cuff describes a group of 4 muscles, whose tendons form a coarse tendon cap together with the coracohumeral ligament. This cap encloses the shoulder joint. They draw from the scapula to the greater tubercle, or the minor tubercle, of the humerus.

Since this tendon plate is formed by the short shoulder rotators, the term "rotator cuff" has been naturalized.

2 Assembly

The rotator cuff encloses the shoulder joint from cranial, ventral, and -for a small part- dorsal direction. It comprises:

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3 Function

The shoulder joint owns - in contrast to the hip joint - just a small bony frame due to its relatively small socket. Therefore, itís an important task of the rotator cuff to stabilize the shoulder joint. It centers the joint head of the humerus in the socket of the scapula (shoulder blade), and it tensions the joint capsule of the shoulder joint. The individual muscles are responsible for the interior and exterior as well as the abduction of the arm.

4 Clinical presentation

Lesions of the shoulder can concur with torn tendons in the region of the rotator cuff (rotator cuff tear).

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