extrinsic muscles

Question 1

origin superficial pectoral muscle

Answer 1

first three sternebrae; median fibrous raphe

Question 2

insertion of superficial pectoral

Answer 2

crest of the greater tubercle of the humerus

Question 3

action superficial pectoral

Answer 3

adduct the limb; prevent adduction of the limb

Question 4

origin deep pectoral

Answer 4

sternum; median fibrous raphe

Question 5

insertion deep pectoral

Answer 5

lesser tubercle of the humerus; greater tubercle of the humerus and its crest

Question 6

action deep pectoral

Answer 6

when limb advanced and fixed: pull trunk cranially and extend the shoulder
when limb bearing weight: draw limb caudally and flex the shoulder

Question 7

brachiocephalicus muscles

Answer 7

cleidobrachialis, clediocervicalis; clediomastoideus

Question 8

origin clediobrachialis

Answer 8

clavicular intersection

Question 9

insertion clediobrachialis

Answer 9

distal end of cranial humerus

Question 10

action brachiocephalicus

Answer 10

advance the limb; extend shoulder, draw head and neck to the side

Question 11

origin clediocervicalis

Answer 11

clavicular intersection

Question 12

insertion clediocervicalis

Answer 12

middorsal fibrous raphe of the neck

Question 13

origin clediomastoideus

Answer 13

clavicular intersection

Question 14

insertion clediomastoideus

Answer 14

mastoid process of the temporal bone

Question 15

attachments omotransversarius

Answer 15

wing of the atlas; distal end of the spine of the scapula

Question 16

action omotransversarius

Answer 16

advance the limb; flex the neck laterally

Question 17

origin trapezius

Answer 17

median fibrous raphe of the neck; supraspinous ligament

Question 18

parts of trapezius

Answer 18

cervical and thoracic

Question 19

insertion trapezius

Answer 19

spine of scapula

Question 20

action trapezius

Answer 20

elevate and abduct limb

Question 21

parts rhomboideus

Answer 21

capitis, cervicis, thoracis

Question 22

origin rhomboideus

Answer 22

base of the skull; median fibrous raphe of neck. spinous processes of thoracic vertebrae

Question 23

insertion rhomboideus

Answer 23

spine of the scapula

Question 24

action rhomboideus

Answer 24

elevate and abduct the limb

Question 25

origin latissimus dorsi

Answer 25

thoracolumbar fascia; last few ribs

Question 26

insertion latissimus dorsi

Answer 26

teres major tuberosity of humerus via the teres major tendon

Question 27

action latissimus dorsi

Answer 27

draw limb caudally (digging); flex shoulder

Question 28

origin serratus ventralis

Answer 28

ribs; transverse processes of cervical vertebrae

Question 29

insertion serratus ventralis

Answer 29

serrated face of the scapula

Question 30

action serratus ventralis

Answer 30

support the trunk; depress the scapula