Cranial Nerve Species Differences Chart

Question 1

cranial nerve I and associated foramen? species differences?

Answer 1

Olfactory; cribriform plate; no

Question 2

cranial nerve II and associated foramen? species differences?

Answer 2

Optic; optic canal; no

Question 3

cranial nerve III and associated foramen? species differences?

Answer 3

Oculomotor; orbital fissure; foramen orbitorotundum in ruminants and pigs

Question 4

cranial nerve IV and associated foramen? species differences?

Answer 4

Trochlear; orbital fissure (or trochlear in horses); foramen orbitorotundum in ruminants and pigs

Question 5

cranial nerve V1 and associated foramen? species differences?

Answer 5

Ophthalmic; orbital fissure; foramen orbitorotundum in ruminants and pigs

Question 6

cranial nerve V2 and associated foramen? species differences?

Answer 6

Maxillary; round foramen (plus alar canal); foramen orbitorotundum in ruminants and pigs

Question 7

cranial nerve V3 and associated foramen? species differences?

Answer 7

Mandibular; oval foramen; formen lacerum in horses and pigs

Question 8

cranial nerve VI and associated foramen? species differences?

Answer 8

Abducent; orbital fissure; foramen orbitorotundum in ruminants and pigs

Question 9

cranial nerve VII and associated foramen? species differences?

Answer 9

Facial; internal acoustic meatus, facial canal, stylomastoid foramen; no

Question 10

cranial nerve VIII and associated foramen? species differences?

Answer 10

Vestibulocochlear; internal acoustic meatus; no

Question 11

cranial nerve IX and associated foramen? species differences?

Answer 11

Glossopharyngeal; jugular foramen & tympanopccipital fissure; jugular foramen in the horse

Question 12

cranial nerve X and associated foramen? species differences?

Answer 12

Vagus; jugular foramen & tympanopccipital fissure; jugular foramen in the horse

Question 13

cranial nerve XI and associated foramen? species differences?

Answer 13

Accessory; jugular foramen & tympanopccipital fissure; jugular foramen in the horse

Question 14

cranial nerve XII and associated foramen? species differences?

Answer 14

Hypoglossal; hypoglossal foramen; no