Musculoskeletal System: Cat Differences Flashcards Preview

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Flashcards in Musculoskeletal System: Cat Differences Deck (36)
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1

Clavicle

independent vestigial bone
palpable w/in Brachiocephalicus muscle

2

Scapula

cranial angle more curvved
scapular spine has a tuberosity
acromion process divided into hamate process & suprahamate process
corocoid process is well-developed & overhands glenoid cavity

3

Humerus

lateral tubercle of humerus has a fossa for the hamate process of scapula
supra-condylar foramen through which an artery & nerve pass
lateral epicondyle is rounded caudally & smaller
medial epicondyle is rounded caudally & ends abruptly
condyle is distinctively divided into medial trochlea & lateral capitulum
coronoid fossa in medial to radial fossa to accomoadate the medial coronoid process of the ulna

4

Radius & ulna

olecranon appears rectangular
body of ulna is convex along caudal border
wider space b/w bones (especially at distal end)

5

Wider space b/w radius & ulna for

pronounced supination & pronation

6

Manus

long bones relatively straighter
bone angles more acute
carpal organ
accessory carpal bone less elongated

7

What is the carpal organ

specialized cutanous body overlying the accessory bone
studded w/ sensory hairs like whiskers & whole pad resembles a nodule

8

Cleidobrachialis

extends farther down the humerus to insert on the ulna b/w the Biceps brachii & Brachialis muscles

9

Functional relevance of different attachments for Cleidobrachialis in cats

can flex the elbow
good for crouching & hunting

10

Trapezius thoracis

more developed in cats

11

Long Head of Triceps

covered by Tensor fascia antebrachia

12

Anconeus

better developed in cats

13

Brachialis

inserts only on the ulna

14

Biceps brachii

inserts only on the radius

15

Brachialis & biceps brachii are useful for what

pronation & supination

16

Brachioradialis

well developed in cats for supination
forms a rdige along the course of the cephalic vein

17

Pronator quadratus

larger gap b/w radius & ulna, so this muscle is larger

18

Advantage of larger Pronator quadratus

manipulation

19

Supinator

well developed in cat
rotation occurs in antebrachium, so paw also rotates

20

Advantage of Supinator

defense & offense

21

Extensor carpii radialis

tendons insert onto metacarpal tuberosity of II III IV metacarpal bones on cat

22

Additional attachments of extensor carpii radialis do what

allow for better paw movement

23

Lateral digital extensor

insertion occurs on extensor process of middle phalanx for all functional digits

24

Usefulness of small flexor, adductor, & abductor muscles of manus being better developed

diffusion of concussion when cats jump from a height

25

Deep digital flexor

protrude claws when climbing a tree or catching prey
contractile muscular power is greater than the elastic power of ligaments
radial & ulnar heads better developed

26

Why are radial & ulnar head of Deep Digital Flexor more developed in cats

flexion of distal interphalangeal joints to facilitate efficient claw protrusion

27

Dorsal elastic ligament

retractable claws
attaches b/w phalanx II & III
retracted claw brings III phalanx to lie to the side of the II phalanx

28

Pubis bone

wings of ilium are parallel

29

Femur

shaft is straighter than in dogs

30

Tibia, fibula, & bones of pes

retractable claws, otherwise similar