Lecture 15 10/23/23

Question 1

What is a plexus?

Answer 1

where nerves come together and form new nerves

Question 2

Which nerves make up the brachial plexus?

Answer 2

-C6
-C7
-C8
-T1
-T2

Question 3

Which nerves of the brachial plexus form the radial nerve?

Answer 3

-C7
-C8
-T1
-T2

Question 4

Which nerves make up the lumbosacral plexus?

Answer 4

-L4
-L5
-L6
-L7
-S1
-S2
-S3

Question 5

Which nerves of the lumbosacral plexus form the sciatic nerve?

Answer 5

-L6
-L7
-S1
-S2

Question 6

Which muscles are innervated by the suprascapular n.?

Answer 6

-supraspinatus
-infraspinatus

Question 7

What is shoulder sweeney?

Answer 7

-result of suprascapular n. damage
-supraspinatus and infraspinatus atrophy
-spine of scapula shows through skin

Question 8

Which muscles are innervated by the musculocutaneous n.?

Answer 8

cranial mm. of the brachium

Question 9

Which action is associated with the musculocutaneous n.?

Answer 9

flexion of cubital j.

Question 10

Which muscles are innervated by the axillary n.?

Answer 10

lateral mm. of the shoulder

Question 11

Which action is associated with the axillary n.?

Answer 11

flexion of humeral j.

Question 12

Which muscles are innervated by the radial n.?

Answer 12

-caudal mm. of brachium
-craniolateral mm. of antebrachium

Question 13

Which actions are associated with the radial n.?

Answer 13

-extension of cubital j.
-extension of carpal j.
-extension of digital j.

Question 14

What is the overall function of the radial n.?

Answer 14

allows the animal to bear weight on the forelimb

Question 15

What is seen with high radial paralysis?

Answer 15

-dog on 3 legs
-passive flexion of cubital, carpal, and digital joints

Question 16

What is seen with low radial paralysis?

Answer 16

-paw flip
-passive flexion of carpal and digital joints

Question 17

Which muscles are innervated by the medial and ulnar nerves?

Answer 17

caudomedial mm. of antebrachium

Question 18

Which actions are associated with the medial and ulnar nerves?

Answer 18

-flexion of carpal joints
-flexion of digital joints

Question 19

What is the cutaneous branch of the musculocutaneous n.?

Answer 19

medial cutaneous antebrachial n.

Question 20

What is the cutaneous branch of the axillary n.?

Answer 20

craniolateral cutaneous brachial n.

Question 21

What is the cutaneous branch of the radial n.?

Answer 21

lateral cutaneous antebrachial n.

Question 22

What is the cutaneous branch of the ulnar n.?

Answer 22

caudal cutaneous antebrachial n.

Question 23

What does the cutaneous branch of the median n. innervate?

Answer 23

palmar paw

Question 24

Where would you perform a sensory test for the radial n.?

Answer 24

dorsal paw

Question 25

Where would you perform a sensory test for the median n.?

Answer 25

center of palmar paw

Question 26

Where would you perform a sensory test for the ulnar n.?

Answer 26

5th digit

Question 27

Which arteries provide the flow to the front limb?

Answer 27

-subclavian a.
-axillary a.
-brachial a.
-median a.

Question 28

Where does the subclavian a. become the axillary a.?

Answer 28

at the first rib

Question 29

Where does the axillary a. become the brachial a.?

Answer 29

between the circumflex humoral a. and the deep brachial a.

Question 30

Where does the brachial a. become the median a.?

Answer 30

after the common interosseous a.

Question 31

Where does the cephalic v. drain into?

Answer 31

external jugular v.

Question 32

Which region of the body does the cephalic v. drain?

Answer 32

ventral paw (distally)

Question 33

Where does the axillobrachial v. drain into?

Answer 33

main venous return

Question 34

Where does the omobrachial v. drain into?

Answer 34

external jugular v.

Question 35

Where does the median cubital v. drain into?

Answer 35

main venous return

Question 36

Which region of the body does the accessory cephalic vein drain?

Answer 36

dorsal paw