Lecture 4

Question 1

Signs of Horners syndrome

Answer 1

Ptosis
Miosis
Elevated third eyelid
Enopthalmus (retracted eyeball)

Question 2

Cranial nerve 4 in small animals

Answer 2

contralateral ventromedial resting strabismus; must be seen in the fundus of the dog

Question 3

Cranial nerve 4 in large animals

Answer 3

contralateral ventroLATERAL resting strabismus

Question 4

Cranial nerve 6

Answer 4

will cause ventromedial or medial resting strabismus

Question 5

strabismus

Answer 5

abnormal eye position indicdating dysfunction of CN 3,4, and 6

Question 6

positional strabismus is associated with dysfunction of what cranial nerve

Answer 6

CN 8

Question 7

decreased facial sensation indicates dysfunction of what?

Answer 7

CN 5, 7 contralateral cortex

Question 8

Mandibular nerve of the trigeminal

Answer 8

motor to muscles of mastication

Question 9

dropped jaw is pathognomonic for what?

Answer 9

bilateral mandibular branch dysfunction of cranial nerve 5

Question 10

why does neurotropic keratitis?

Answer 10

the opthalic and maxillary dysfunction control blinking; dysfunction results in dry eye

Question 11

Causes of facial nerve paralysis

Answer 11

idiopathic
inner/middle ear disease
hypothyroidism
trauma
neoplasia
polyneuropathy

Question 12

hemifacial spasm

Answer 12

overfiring of CN 7

1. irritation of CN7 or chronic CN7 pralysis (fibrosis of the muscles)

Question 13

vestibular lesions are indicated by what side?

Answer 13

slow phase is on the side of the lesion

Question 14

poor gag or swallow is dysfunction of what nerve?

Answer 14

CN 9 or CN 10

Question 15

supratentorium encompasses what regions

Answer 15

telencephalon, diencephalon, CN 1 and 2

Question 16

Infratentorium encompasses what regions?

Answer 16

Mesencephalon, Metenchephalon, Myelencephalon

CN 3-12

Question 17

Functional corssover occurs where and what does it indicate?

Answer 17

Above the mesencephalon, and indicates lesions from the supratentorium will affect the body on the contralateral side