Posterior Scapular and Glenohumeral Structures Flashcards by Shannon Werts | Brainscape

Q

What are the muscles that make up the rotator cuff?

A

Supraspinatus, Infraspinatus, Teres Minor, and Subscapularis

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Q

What is the origin of the supraspinatus?

A

Supraspinatus fossa.

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Q

What is the origin of the infraspinatus?

A

Infraspinatus fossa.

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Q

What is the origin of the teres minor?

A

Lateral scapular border.

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Q

What is the origin of the subscapularis?

A

Subscapular fossa.

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Q

What is the insertion of the supraspinatus?

A

Greater tubercle of the humerus.

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Q

What is the insertion of the infraspinatus?

A

Greater tubercle of the humerus.

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Q

What is the insertion of the teres minor?

A

Greater tubercle of the humerus.

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Q

What is the insertion of the subscapularis?

A

Lesser tubercle of the humerus.

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Q

What are the actions of the supraspinatus?

A

Abduction of the humerus.

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Q

What are the actions of the infraspinatus?

A

External rotation of humerus.

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Q

What are the actions of the teres minor?

A

External rotation of the humerus.

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Q

What are the actions of the subscapularis?

A

Medial rotation of the humerus.

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Q

What innervates the supraspinatus?

A

Suprascapular nerve

(C5-C6).

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Q

What innervates the infraspinatus?

A

Suprascapular nerve (C5-C6).

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Q

What innervates the teres minor?

A

Axillary nerve (C5-C6).

Q

What innervates the subscapularis?

A

Upper and lower subscapular nerves (C5-C6).