Exam 2 - Skull

Question 1

CNI

Answer 1

cribriform plate

olfactory nerve

Question 2

Transorbital Lobotomy

Answer 2

Used to be used to correct mental illness (orbitoclast through nose and eye to cut thin bone that separates eye sockets from frontal bone to cut brain connections)

Question 3

Petrous

Answer 3

middle cranial fossa
part of temporal bone
1. separates the middle from the posterior cranial fossa
2. contains special organs of hearing and balance

Question 4

CNII

Answer 4

middle cranial fossa
optic canal (next to lesser wings, but in greater wing)
optic nerve

Question 5

Superior Orbital Fissure

Answer 5

middle cranial fossa

CN III, IV, V(1) (opthalmic, purely sensory), VI –> control eye movement (6 muscles)

Question 6

CN V(2)

Answer 6

middle cranial fossa
Foramen Rotundum
Maxillary Nerve (purely sensory)

Question 7

CN V(3)

Answer 7

middle cranial fossa
Foramen Ovale
Mandibular Branch (sensory and motor functions)

Question 8

CN V

Answer 8

Trigeminal Nerve

Question 9

Foramen Spinosum

Answer 9

middle cranial fossa
& groove
For middle meningeal artery

Question 10

Carotid canal

Answer 10

middle cranial fossa

internal carotid artery; oblique

Question 11

Foramen Lacerum

Answer 11

middle cranial fossa

covered with fascia in living; no structure; straight

Question 12

Internal Acoustic Canal

Answer 12

posterior cranial fossa

CN VII, VIII

Question 13

CN VII

Answer 13

internal acoustic canal
exits through stylomastoid foramen
Facial - sensory and motor
Main motor; facial expressions
smaller than VIII, zygomatic major and minor

Question 14

CN VIII

Answer 14

internal acoustic canal
Vestibulococchlear nerve
Hearing and balance

Question 15

Jugular Foramen

Answer 15

posterior cranial fossa

CN IX, X, and XI (

Question 16

Sigmoid Sinus

Answer 16

lies between dura mater, for blood vessels

Question 17

Hypoglossal canal

Answer 17

posterior cranial fossa
CN XII
mainly motor

Question 18

Parietal foramen

Answer 18

Superior skull

for emissary vein

Question 19

Facial canal

Answer 19

petrous portion of temporal bone
connects internal auditory meatus (iac) and stylomastoid foramen (smf)

potential site for compression injuries of CN VII due to inflammatory processes

Question 20

Supraorbital foramen

Answer 20

CN V(1)

Question 21

Infraorbital foramen

Answer 21

CN V(2)

Question 22

Mental foramen

Answer 22

CN V(3)