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Flashcards in Muscles (Insertion/Origin/Etc.) Deck (14)
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1

Which of the two superficial pectoral muscles is smaller?

descending pectoral

2

Which of the two superficial pectoral muscles is more superficial than the other?

descending pectoral

3

What is the origin of the descending pectoral muscle?

first sternebrae

4

What is the insertion of the descending pectoral muscle?

greater tubercle of humerus

5

What is the origin of the transverse pectoral?

first 2-3 sternebrae

6

What is the insertion of the transverse pectoral?

crest of the greater tubercle of the humerus

7

What are the two superficial pectoral muscles?

descending and transverse pectoral

8

What is another name for the deep pectoral?

ascending pectoral

9

What is the action of the superficial pectoral muscles?

adduct front limb/prevent abduction

10

What innervates the cranial pectoral muscles?

C7/C8 spinal nerve, ventral branch

11

What is the origin of the deep pectoral muscle?

ventral sternum, deep fascia near xiphoid process

12

What is the insertion of the deep pectoral muscle?

lesser tubercle of the humerus, aponeurosis to greater tubercle/crest, caudal medial brachial fascia

13

What is the action of the deep pectoral muscle?

extends/flexes shoulder joint, adducts the front limb

14

What innervates the deep pectoral muscle?

C8, T1 caudal pectoral nerves