Cranial Nerves Flashcards
Whats the function of the olfactory nerve
Smell (cn I)
Where does CN I exit the skull
Cribriform plate
Which cranial nerves contain inly sensory fibers
Olfactory
Optic
Vestibulocochlear
What cranial nerves contain only motor fibers
Oculomotor Trochlear Abducens Accessory Hypoglossal
What cranial nerves contain mixed fibers
Trigeminal
Facial
Glossopharyngeal
Vagus
Where does the optic nerve exit the skull
Optic canal
What is the function of CN III
Eye movement
Pupil constriction
Eyelid opening
Accomodation
What is the function of the CN IV
Upper eyelid and eye movement (superior oblique)
Where does oculomotor exit the skull
Superior orbital fissure
Where does trochlear nerve exit the skull
Superior orbital fissure
What is the general function of CN V
Facial sensation and mastication
What is the function of VI branch
Ophthalmic nerve: sensory innervation of forehead, eyes and nose
What is the function of V2
Maxillary: innervate lower eyelid, teeth, nasal cavity, gums of upper jaw, palate and tonsils
Autonomic supply of lacrimal and nasal glands
What is the function of V3
Mandibular: sensory supply of teeth gums of lower jaw, buccal mucosa,
Dorsum of tongue, external acoustic meatus
Motor of muscles of mastication
Where does ophthalmic nerve exit the skull
Superior orbital fissure
Where does the maxillary nerve exot the skull
Foramen rotundum
Where does the mandibular nerve exit the skull
Foramen ovale
What is the function of CN VI
Eye movement: abduction (lateral rectus)
Where does abducens exit the skull
Superior orbital fissure
What is the function of cn VII
Facial movement Taste from anterior 2/3 tongue Lacrimation Salivation Eyelid closure Auditory reflex
Where does facial nerve exit the skull
Stylomastoid foramen
Internal acoustic meatus
What is the role of cn VIII
Hearing and balance
Where does vestibulocochlear exit the skull
Internal acoustic meatus
What is the role of cn IX
Taste/sensation of posterior 1/3 tongue
Monitor carotid body/chemo/baro receptors
Elevate pharynx/larynx
