Rotator Cuff Muscles | Origins, Insertions, Innervations, and Actions

The video tutorial provides an in-depth look at the rotator cuff muscles, distinguishing them from the shoulder girdle muscles. It covers the anatomy of the scapula and humerus, focusing on the four rotator cuff muscles: supraspinatus, infraspinatus, teres minor, and subscapularis. Each muscle's origin, insertion, blood supply, innervation, and function are discussed, with emphasis on their roles in shoulder movement and stability. The video also explains why teres major is not considered a rotator cuff muscle.

What are the four rotator cuff muscles?

Identify the differences between the greater tubercle and lesser tubercle.

What is the significance of the suprascapular nerve in relation to the rotator cuff?

Describe the function of the supraspinatus muscle.

How does the supraspinatus contribute to shoulder abduction?

What are the blood supplies for the infraspinatus muscle?

What is the primary action of the infraspinatus muscle?

Discuss the role of the teres minor in shoulder movement.

What is the role of the subscapularis muscle in shoulder movement?

Explain why the teres major is not considered a rotator cuff muscle.