Major muscles

Question 1

Facial muscles

Answer 1

Masseter

Temporalis

Question 2

Masseter

Answer 2

Origin: Zygomatic bone
Insertion Caudal ramus of mandible
Action: Assists with mastication

Question 3

Temporalis

Answer 3

O: Parietal crest
I: Coronoid process
A: Assists with mastication

Question 4

Muscles of the lateral neck

Answer 4

Sternocephalicus

Brachiocephalicus

Question 5

Sternocephalicus

Answer 5

O: Manubrium
I: Temporal bone, nuchal crest
A: Flexes head laterally

Question 6

Brachiocephalicus

Answer 6

O: Clavicular intersection
I: Dorsal neck, proximal humerus
A: Pulls limb forward

Question 7

Muscles of the thorax

Answer 7

Intercostal muscles
Serratus ventralis
Pectorals

Question 8

Intercostal muscles

Answer 8

O: Caudal border of cranial rib
I: Cranial border of caudal rib
A: Assists with respiration

Question 9

Serratus ventralis

Answer 9

O: Ribs 1-7
I: Dorsal border of medial scapula
A: Abducts scapula

Question 10

Pectorals

Answer 10

O: Cranial sternum
I: Proximal humerus
A: Flexion of humerus

Question 11

Muscles of the shoulder

Answer 11

Deltoid muscle
Supraspinatus
Infraspinatus

Question 12

Deltoid muscle

Answer 12

O: Spine of scapula, acromion
I: Deltoid tuberosity of humerus
A: Flexion of shoulder

Question 13

Supraspinatus

Answer 13

O: Supraspinous fossa
I: Greater and lesser tubercle of humerus
A: Stabilizes shoulder

Question 14

Infraspinatus

Answer 14

O: Infraspinous fossa
I: Greater tubercle of humerus
A: Stabilizes shoulder

Question 15

Muscles of the upper forelimb

Answer 15

Triceps brachii
Brachialis
Biceps brachii

Question 16

Triceps brachi

Answer 16

O: Infraglenoid tubercle of scapula, caudal border of scapula, proximal humerus
I: Olecranon process
A: Extends the elbow

above the Brachialis

Question 17

Brachialis

Answer 17

O: Proximal/medial humerus
I: Proximal radius
A: Flexion of elbow

lateral

Question 18

Biceps brachii

Answer 18

O: Supraglenoid tubercle of scapula
I: Proximal radius
A: Flexion of elbow

Medial

Question 19

Muscle of the back

Answer 19

Trapezius
Latissimus dorsi
Rhomboideus
Splenius

Question 20

Trapezius

Answer 20

O: Dorsal cervical and thoracic vertebrae
I: Spine of scapula
A: Elevates shoulder and draws limb forward
Superficial

Question 21

Latissimus dorsi

Answer 21

O: Dorsal thoracic to lumbar vertebrae
I: Proximal-medial humerus
A: Flexion of shoulder

One of the largest muscles
Above the trapezius

Question 22

Rhomboideus

Answer 22

O: Dorsal neck and thorax
I: Dorsal border of scapula
A: Draws shoulder dorsocranially

Deep to trapezius

Question 23

Splenius

Answer 23

O: Dorsal process of T1-3 along thoracic vertebrae
I: Occipital/temporal-nuchal crest
A: Extension of head and neck

Deep to Rhomboideus

Question 24

Muscles of medial thigh

Answer 24

Sartorius-cranial

Gracilis-caudal

Question 25

Sartorius

Answer 25

O: Wings of ilium I: Medial stifle A: Flexion of hip

Question 26

Gracilis

Answer 26

O: Pelvic Symphysis I: Medial stifle A: Adduction of hip Caudal to sartorius

Question 27

Muscles of the cranial thigh: Quadriceps

Answer 27

Rectus femoris Vastus medialis Vatstus lateralis Vastus intermedius

Question 28

Rectus femoris

Answer 28

O: Caudal ilium -near acetabulum I: Tibial tuberosity A: Extension of stifle leader/center

Question 29

Vastus medialis

Answer 29

O: Proximal femur I: Tibial tuberosity A: Extension of stifle Medial side

Question 30

Vastus lateralis

Answer 30

O: Proximal femur I: Tibial tuberosity A: Extension of stifle Lateral side

Question 31

Vastus intermedius

Answer 31

O: Proximal femur I: Tibial tuberosity A: Extension of stifle Directly deep to Rectus femoris

Question 32

Muscles of the caudal thigh: Hamstrings

Answer 32

Biceps femoris Semitendinosus Semimembranosus

Question 33

Biceps femoris

Answer 33

O: Ischial tuberosity I: Stifle and proximal tibia A: Extension of hip Largest muscle, most lateral

Question 34

Semitendinosus

Answer 34

O: Ischial tuberosity I: Proximal/caudal tibia A: Flexion of stifle Middle Inserts more distally than other two

Question 35

Semimembranosus

Answer 35

O: Ischial tuberosity I: Medial caudal femur/tibia A: Flexion of stifle Most medial

Question 36

Gastrocnemius

Answer 36

O: Distal/caudal femur- proximal to condyles I: Calcaneous A: Extension of tarsus, flexion of stifle Calf muscle

Question 37

Linea alba

Answer 37

Holds together external abdominal muscles at ventral mid line Aponeuroses

Question 38

Fascia lata

Answer 38

Binds thigh muscles together tightly