Lecture 8 - forepaw Flashcards Preview

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Flashcards in Lecture 8 - forepaw Deck (28):
1

What are the three foot pads?

Distal, metacarpal, and carpal

2

What main ligaments is the carpal joint supported by?

Short ligaments, medial and lateral collateral ligaments

3

What do the short ligaments of the dorsal carpus do?

join neighboring bones in each row
distal bone row to metacarpus

4

What animal has well developed collateral ligaments?

Ungulates

5

What do the collateral ligaments in the carpus allow in carinvorans?

some adduction and abduction

6

What are the three major joints in the paw?

DIP, PIP, and MCP

7

Where are elastic dorsal ligaments?

extend from proximal ends of middle phalanges to unguiclar crests of distal phalanges

8

What does the elastic dorsal ligament do?

Keep claws elevated

9

How are claws protruded?

contraction of FDP

10

How is the elastic dorsal ligament different in cats?

Have two parts, medial ones (longer) and lateral ones (shorter)

11

Where are the medial EDL's?

proximal interphalangeal joint to side of distal phalanx

12

Where are lateral EDL's?

distal end of middle phalanx and top of ungular crest

13

How many medial EDL's are there?

5

14

How many lateral EDL's are there?

1

15

What do anngular ligaments do?

Maintain the integrity of the palm, and prevent bowing in the synovial sheath

16

Where do the long tendons of the digital flexors travel?

synovial sheath

17

Where are the interosseous muscles in the palm?

Lie deep to FDP tendons, cover palmar surfaes of four main metacarpal bones

18

What is embedded in each tendon of an interosseous muscle?

sesamoid bone at the MCP joint
Two embedded at digits II-V

19

What nerve innervates the interosseous muscles?

Ulnar n.

20

What is the action of interosseous?

Flex MCP joint, maintain joint angle when dog bears down on paw

21

What are the main arteries to the forepaw?

Radial a., Ulnar a., Median a, superficial palmar arch, and deep palmar arch

22

What are the major nerves to the forepaw?

Median n., radial n., and ulnar n.

23

What muscles does the radial n. innervate?

none

24

What does the radial n. do?

sensory to dorsum of manus

25

What muscles does the median n. innervate?

muscles moving digit I

26

What sensory is the median nerve responsible for?

Palm

27

Where does the median n. enter the manus?

through the carpal canal

28

What muscles does the ulnar n. innervate?

interosseous mm., muscles of digit V, and lumbricals