Extrinsic Muscles

Question 1

Superficial Pectoral Muscles Origin

Answer 1

sternum

Question 2

Superficial Pectoral Muscles Termination

Answer 2

greater tubercle of the humerus and cranial humeral border

Question 3

Superficial Pectoral mm. Action

Answer 3

adduct the thoracic limb

Question 4

Deep Pectoral m. Origin

Answer 4

sternum

Question 5

Deep Pectoral m. Insertion

Answer 5

greater and lesser tubercles of humerus

Question 6

Deep Pectoral m. Action

Answer 6

adduct thoracic limb and pull it caudally

Question 7

Brachiocephalicus Origin

Answer 7

clavicular intersection

Question 8

Brachiocephalicus Termination

Answer 8

distal cranial humerus, mastoid process of temporal bone, dorsal midline of neck

Question 9

Brachiocephalicus Action

Answer 9

pull thoracic limb cranially (and/or) depress and pull head and neck laterally

Question 10

Sternocephalicus Origin

Answer 10

thoracolumbar fascia

Question 11

Sternocephalicus Termination

Answer 11

mastoid process of temporal bone

occipital bone

Question 12

Sternocephalicus Action

Answer 12

depress head and neck; draw head and neck laterally

Question 13

Sternohyoideus Origin

Answer 13

sternum

Question 14

Sternohyoideus Termination

Answer 14

basihyoid bone

Question 15

Sternothyroideus Origin

Answer 15

cranial aspect of sternum

Question 16

Sternothyroideus Termination

Answer 16

thyroid cartilage

Question 17

Omnotransversarius Origin

Answer 17

wing of the atlas

Question 18

Omnotransversarius Termination

Answer 18

distal spine of the scapula

Question 19

Omnotransversarius Action

Answer 19

pull thoracic limb cranially (and/or) depress and pull head and neck laterally

Question 20

Trapezius Origin

Answer 20

cervical part: dorsal neck

thoracic part: dorsal thorax

Question 21

Trapezius Termination

Answer 21

spine of scapula

Question 22

Trapezius Action

Answer 22

elevate and abduct forelimb

Question 23

Rhomboideus Origin

Answer 23

rhomboideus thoracis: dorsal thorax
rhomboideus cervicis: dorsal neck
rhomboideus capitis: occipital bone

Question 24

Rhomboideus Termination

Answer 24

dorsal border of scapula and/or scapular cartilage

Question 25

Rhomboideus Action

Answer 25

elevate thoracic limb

Question 26

Latissimus Dorsi Action

Answer 26

draw thoracic limb caudally, flex or extend humeral joint

Question 27

Extrinsic muscles of the thoracic limb

Answer 27

superficial pectoral m., deep pectoral m., brachiocephalicus m., omotransversarius m., trapezius m., rhomboideus m., serratus ventralis m., latissimus dorsi m.

Question 28

What muscle has the superficial cervical lymph node?

Answer 28

omotransversarius

Question 29

What lymph node is embedded in the omotransverasarius?

Answer 29

superficial cervical lymph node

Question 30

What muscle is the agonist of the omotransversarius?

Answer 30

brachiocephalicus

Question 31

What muscle is the agonist of the brachiocephalicus?

Answer 31

omotransversarius

Question 32

What is the agonist of the rhomboideus?

Answer 32

trapezius

Question 33

What is the agonist of the trapezius?

Answer 33

rhomboideus

Question 34

Serratus Ventralis origin

Answer 34

Serratus ventralis cervicis: cervical vertebrae | Serratus ventralis thoracis: thoracic wall (ribs)

Question 35

Serratus Ventralis Termination

Answer 35

serrated face of scapula

Question 36

Serratus Ventralis Action

Answer 36

support the trunk

Question 37

What is the sternocephalicus a partial agonist of?

Answer 37

omotransversarius

Question 38

Where is the jugular furrow?

Answer 38

between the brachiocephalicus and sternocephalicus- where external jugular lies

Question 39

What muscles originate in the sternum?

Answer 39

superficial pectoral, deep pectoral, sternocephalicus, sternohyroideus, sternothyroideus

Question 40

What muscles adduct the thoracic limb?

Answer 40

superficial pectoral, deep pectoral, subscapularis, coracobrachialis

Question 41

What muscles depress the head and pull head and neck laterally and pull thoracic limb cranially?

Answer 41

brachiocephalicus, omotransversarius, sternocephalicus (only depress head and pull laterally)

Question 42

What muscles terminate on the spine of the scapula?

Answer 42

omotransversarius and trapezius

Question 43

What muscles terminate at the teres major tuberosity?

Answer 43

Latissimus dorsi and teres major