Lab 5

Question 1

CAT
pectoantebrachialis

Answer 1

origin: manubrium of sternum

Insertion: fascia of the antebrachium

Action: adducts and protracts humerus

Question 2

CAT
pectoralis major and minor

Answer 2

origin: sternum

Insertion: humerus

action: adducts humerus

Question 3

CAT
xiphihumeralis

Answer 3

origin: xiphoid * process of sternum

insertion: humerus

action: adducts and retracts humerus

Question 4

CAT
clavotrapezius

Answer 4

origin: spinous process

insertion: clavical

action: pulls scapula dorsally

Question 5

CAT
acromiotrapezius

Answer 5

origin: spinous process

insertion: acromion

action: pulls scapula dorsally

Question 6

CAT
spinotrapezius

Answer 6

origin: spinous process

insertion: spine of scapula

action: protracts humerus

Question 7

CAT
latissimus dorsi

Answer 7

origin: spinous process through lumbodorsal fascia

insertion: humerus

action: retracts humerus

Question 8

CAT
levator scapulae ventralis

Answer 8

origin: atlas

insertion: scapula

action: pulls scapula cranially

Question 9

CAT
spinodeltoid

Answer 9

origin: spine of scapula

insertion: mid-humerus

action: retracts humerus

Question 10

CAT
acromiodeltiod

Answer 10

origin: acromion

insertion: mid-humerus

action: retracts humerus

Question 11

CAT
clavobranchialis

Answer 11

origin: clavicle

insertion: mid-humerus

action: protracts humerus

Question 12

where is the clavicle

Answer 12

it is not attached to any bone, and it floats in the connective tissue at the insertion of the clavotrapezius and the clavobranchialis

Question 13

what would be the advantage of having these several distinct muscles, rather than a single muscle

Answer 13

more subtle variety of movement

Question 14

define protraction of the humerus

Answer 14

extending outwards

Question 15

define retraction of the humerus

Answer 15

bringing toward the body

Question 16

what are the rhomboid group and settates ventralis homologous with

Answer 16

portions of the external oblique muscles of amphibians

Question 17

CAT
subscapularis

Answer 17

origin: subscapular fossa

insertion: lesser tuberosity

action: adducts humerus

Question 18

CAT
supraspinatus

Answer 18

origin: supraspinatus fossa

insertion: greater tuberosity

action: protracts humerus

Question 19

CAT
infraspinatus

Answer 19

origin: infraspinatus fossa

insertion: greater tuberosity

action: lateral rotation

Question 20

CAT
teres minor

Answer 20

origin: cranial border of scapula

insertion: greater tuberoisity

action: medial rotation

Question 21

CAT
teres major

Answer 21

origin: caudal border of scapula

insertion: proximal humerus

action: retracts humerus

Question 22

CAT
rhomboideus (capitis, cervices, and thoracis parts)

Answer 22

origin: spinous process

insertion: vertebral (superior) border of scapula

action: pulls scapula cranially, or toward cervical/yhoracic vertebrae

Question 23

CAT
serratus ventralis

Answer 23

origin: ribs

insertion: vertebral (superior) border of scapula

action: protracts scapula (pulls it downard)

Question 24

when standing, which muscle of a quadrupedal mammal, like a cat, bears the weight of the body on the forelimb?

Answer 24

serratus ventralis

Question 25

CAT
epitrochlearis

Answer 25

origin: joins latissimus dorsi

insertion: olecranon

action: extends elbow

Question 26

CAT
triceps brachii

Answer 26

origin: 2 ‘heads’ from humerus, one from scapula near glenoid

insertion: olecranon

action: extends elbow

Question 27

CAT
anconeus

Answer 27

origin: lateral epicondyle

insertion: olecranon

action: extends elbow

Question 28

CAT
coracobranchialis

Answer 28

origin: coracoid process

insertion: proximal humerus

action: adducts humerus

Question 29

CAT
biceps brachii

Answer 29

origin: scapula near glenoid

insertion: radial tuberosity

action: flexes elbow

Question 30

CAT
brachialis

Answer 30

origin: humerus

insertion: proximal ulna

action: flexes elbow