Lecture 4 - Muscles

Question 1

What is the origin of the omotransversarius?

Answer 1

Distal end of spine of scapula

Question 2

What is the insertion of the omotransversarius?

Answer 2

Transverse wing of the atlas

Question 3

What is the nerve of the omotransversarius?

Answer 3

Accessory n.

Question 4

What is the action of the omotransversarius?

Answer 4

Advance limb or flex neck laterally

Question 5

What is the origin of the trapezius?

Answer 5

Nuchal ligament, supraspinous ligament

Question 6

What is the insertion of the trapezius?

Answer 6

Spine of scapula

Question 7

What is the nerve of the trapezius?

Answer 7

Accessory n.

Question 8

What is the action of the trapezius?

Answer 8

Elevate shoulder, abduct shoulder, draws limb forward, fixes shoulder

Question 9

What is the origin of the Brachiocephalis?

Answer 9

clavical intersection

Question 10

What is the insertion of the cleidobrachialis?

Answer 10

Distal end of cranial border of humerus

Question 11

What is the insertion of the cleidocephalis?

Answer 11

Cranial 1/2 of mid-dorsal raphe and mastoid process

Question 12

What is the nerve of the Brachiocephalis?

Answer 12

Accessory n.

Question 13

What is the action of the Brachiocephalis?

Answer 13

Advance forelimb, extend shoulder joint, draw head and neck laterally

Question 14

What are the two parts of the brachiocephalis?

Answer 14

cleidobrachialis and cleidocephalicus

Question 15

What are the parts of the rhomboideus?

Answer 15

thoracis, cervicis, and capitis

Question 16

What is the origin of the thoracis?

Answer 16

Spinous process of first 7 thoracic vertebrae

Question 17

What is the origin of the cervicis?

Answer 17

Median raphe of neck

Question 18

What is the origin of the capitis?

Answer 18

Occipital bone and nuchal ligament

Question 19

What is the nerve of the rhomboideus?

Answer 19

Ventral rami of C and T spinal n.

Question 20

What is the insertion of the rhomboideus?

Answer 20

Dorsal border of scaplula

Question 21

What is the action of the rhomboideus?

Answer 21

Elevate thoracic limb and draw scapula against trunk

Question 22

What is the origin of the latissimus dorsi?

Answer 22

Thoracolumbar fascia

Question 23

What is the insertion of the latissimus dorsi?

Answer 23

Teres major tuberosity (of humerus)

Question 24

What is the nerve of the latissimus dorsi?

Answer 24

Thoracodorsal n.

Question 25

What is the action of the latissimus dorsi?

Answer 25

Draw free limb caudally, flex shoulder joint

Question 26

What is the origin of the superficial pectoral?

Answer 26

1st two sternebrae, fibrous raphe between adjacent muscles

Question 27

What is the insertion of the superficial pectoral?

Answer 27

whole crest of greater tubercle of humerus

Question 28

What is the nerve of the superficial pectoral?

Answer 28

Cranial pectoral n.

Question 29

What is the action of the superficial pectoral?

Answer 29

Adducts limbs, functions to prevent abduction of limb when bearing weight

Question 30

What is the origin of the deep pectoral?

Answer 30

Ventral part of the sternum

Question 31

What is the insertion of the deep pectoral?

Answer 31

1. cranial part: lesser tubercle of humerus, w/ aponeurosis to greater tubercle 2. caudal part: medial brachial fascia

Question 32

What is the nerve of the deep pectoral?

Answer 32

Caudal pectoral n.

Question 33

What is the action of the deep pectoral?

Answer 33

Adducts limb

Question 34

What is the action of the deep pectoral when limb is advanced and fixed?

Answer 34

pulls trunk cranially and extends shoulders

Question 35

What is the action of the deep pectoral when limb is not bear weight?

Answer 35

draws limb caudally and flexes shoulder

Question 36

What is the origin of the subclavius?

Answer 36

Cranial part of sternum

Question 37

What is the insertion of the subclavius?

Answer 37

Epimysium of supraspinatus m.

Question 38

What is the nerve of the subclavius?

Answer 38

Caudal/Cranial pectoral n.

Question 39

What is the action of the subclavius?

Answer 39

Acts w/ deep and superficial pectoral muscles

Question 40

What animal has a subclavius?

Answer 40

horse

Question 41

What are the two regions of the serratus ventralis?

Answer 41

thoracis and cervicis

Question 42

What is the origin of the thoracis?

Answer 42

Transverse processes of last C3-C7 vertebrae

Question 43

What is the origin of the cervicis?

Answer 43

Ribs 2-7(8)

Question 44

What is the insertion of the serratus ventralis?

Answer 44

Facies serrata on dorsomedial 1/3 of scapula

Question 45

What is the nerve of the serratus ventralis?

Answer 45

Long thoracic nerve

Question 46

What is the action of the serratus ventralis?

Answer 46

Depress scapula and support trunk