Muscles (Insertion/Origin/Etc.)

Question 1

Which of the two superficial pectoral muscles is smaller?

Answer 1

descending pectoral

Question 2

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

Answer 2

descending pectoral

Question 3

What is the origin of the descending pectoral muscle?

Answer 3

first sternebrae

Question 4

What is the insertion of the descending pectoral muscle?

Answer 4

greater tubercle of humerus

Question 5

What is the origin of the transverse pectoral?

Answer 5

first 2-3 sternebrae

Question 6

What is the insertion of the transverse pectoral?

Answer 6

crest of the greater tubercle of the humerus

Question 7

What are the two superficial pectoral muscles?

Answer 7

descending and transverse pectoral

Question 8

What is another name for the deep pectoral?

Answer 8

ascending pectoral

Question 9

What is the action of the superficial pectoral muscles?

Answer 9

adduct front limb/prevent abduction

Question 10

What innervates the cranial pectoral muscles?

Answer 10

C7/C8 spinal nerve, ventral branch

Question 11

What is the origin of the deep pectoral muscle?

Answer 11

ventral sternum, deep fascia near xiphoid process

Question 12

What is the insertion of the deep pectoral muscle?

Answer 12

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

Question 13

What is the action of the deep pectoral muscle?

Answer 13

extends/flexes shoulder joint, adducts the front limb

Question 14

What innervates the deep pectoral muscle?

Answer 14

C8, T1 caudal pectoral nerves