Anterior Chest Muscles

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10 Terms

1
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What is the origin of the Pectoralis Major?

1) medial 1/3 of the clavicle

2) manubrium and body of sternum

3) costal cartilages of ribs 1-6

2
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What is the insertion of the Pectoralis Major?

greater tubercle of the humerus

3
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What is the action of the Pectoralis Major?

1) adducts the arm at the shoulder 

2) medial rotation of the arm at the shoulder 

4
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What is the origin of the Pectoralis Minor?

Ribs 3-5

5
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What is the insertion of the Pectoralis Minor?

coracoid process of the scapula

6
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What is the action of the Pectoralis Minor?

1) depression and lateral rotation of the scapula

2) elevates ribs in forced inspiration 

7
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What is the origin of the Serratus Anterior?

Ribs 1-8

8
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What is the insertion of the Serratus Anterior?

anterior (costal) surface of vertebral border of the scapula

9
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What is the action of the Serratus Anterior?

1) protracts scapula

2) stabilizes scapula 

3) helps with upward rotation of scapula 

10
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What is the innervation of the Serratus Anterior?

long thoracic nerve, C5-C7