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Infraspinatus Muscle Anatomy

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Questions and Answers

What is the main difference between the fibers of layer 2 and layer 3?

Orientation

Thickness

Vascularization

Elasticity (correct)

What is the role of the rotator cable in the rotator cuff?

To increase the vascularization of the area

To diminish the load on the rotator crescent (correct)

To provide additional strength to the tendons

To facilitate the movement of the tendons

What is the shape of the SS insertion on the humeral head?

Rectangular

Triangular (correct)

Trapezoid

Circular

What is the shape of the IS insertion on the humeral head?

Trapezoid Signup and view all the answers

How many layers are there in the rotator cuff?

5 Signup and view all the answers

What is the significance of the footprint insertions in surgical planning?

To adequately restore shoulder function Signup and view all the answers

What is the characteristic of the fibers in layer 3?

Less elastic and more prone to tear Signup and view all the answers

How many layers of fibers are present in the SS and IS muscles?

5 Signup and view all the answers

What is the location of the rotator cable in the rotator cuff?

In the inferior part of the SS and IS Signup and view all the answers

What is the name of the area lateral to the rotator cable?

Rotator crescent Signup and view all the answers

What is the location of the infraspinatus muscle origin?

Dorsal surface of the scapula Signup and view all the answers

What is the relationship between the IS and the teres minor?

They are parallel but separated by a thick fascia Signup and view all the answers