Final

Question 1

Info on CN I

• name
• info carried
• where does it come from
• where does it go
• lesion

Answer 1

olfactory nerve

• sensory info
• passes through: cribiform plate
• ends up: superior nasal cavity
• descends from olfactory bulb
• lesion= anosmia (lack of smell) due to lateral shearing at the cribiform plate from trauma

Question 2

CN II

• name
• info carried
• where does it come from
• where does it go
• lesion

Answer 2

Optic Nerve

info= sensory

passes through optic canal

lesion= blindness

Question 3

CN III

Answer 3

Oculomotor nerve

info= motor

passes= part goes through cavernous sinus then superior orbital fissure

lesion= diplopia / strabismus (eye point different directions)

Question 4

CN IV

Answer 4

trochlear

info= motor

pathway: cavernous sinus and superior orbital fissure

lesion= about the same as CN3 - strabismus and diplopia

Question 5

branches of CN V / what info do they carry

Answer 5

ophthalmic V1 - sensory
maxillary V2 - sensory
mandibular V3- sensory/motor

Question 6

CN V1

• name
• info carried
• where does it come from
• where does it go
• branches

Answer 6

ophthalmic V1

• sensory
• exits via superior orbital fissure to enter orbit

branches

• frontal nerve
• lacrimal nerve
• nasociliary nerve

Question 7

CN V2

• name
• info carried
• where does it come from
• where does it go
• branches

Answer 7

V2 maxillary branch

• sensory
• exits foramen rotundum,
  through the inferior orbital fissure branches into
  1. zygomatic
  2. infraorbital nerve-> infraorbital foramen