Exam 2 - Skull Flashcards
CNI
cribriform plate
olfactory nerve
Transorbital Lobotomy
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)
Petrous
middle cranial fossa
part of temporal bone
1. separates the middle from the posterior cranial fossa
2. contains special organs of hearing and balance
CNII
middle cranial fossa
optic canal (next to lesser wings, but in greater wing)
optic nerve
Superior Orbital Fissure
middle cranial fossa
CN III, IV, V(1) (opthalmic, purely sensory), VI –> control eye movement (6 muscles)
CN V(2)
middle cranial fossa
Foramen Rotundum
Maxillary Nerve (purely sensory)
CN V(3)
middle cranial fossa
Foramen Ovale
Mandibular Branch (sensory and motor functions)
CN V
Trigeminal Nerve
Foramen Spinosum
middle cranial fossa
& groove
For middle meningeal artery
Carotid canal
middle cranial fossa
internal carotid artery; oblique
Foramen Lacerum
middle cranial fossa
covered with fascia in living; no structure; straight
Internal Acoustic Canal
posterior cranial fossa
CN VII, VIII
CN VII
internal acoustic canal exits through stylomastoid foramen Facial - sensory and motor Main motor; facial expressions smaller than VIII, zygomatic major and minor
CN VIII
internal acoustic canal
Vestibulococchlear nerve
Hearing and balance
Jugular Foramen
posterior cranial fossa
CN IX, X, and XI (
Sigmoid Sinus
lies between dura mater, for blood vessels
Hypoglossal canal
posterior cranial fossa
CN XII
mainly motor
Parietal foramen
Superior skull
for emissary vein
Facial canal
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
Supraorbital foramen
CN V(1)
Infraorbital foramen
CN V(2)
Mental foramen
CN V(3)
