Cranial Nerves Flashcards
CN 0 (name and function)
terminal
-sensory: pheromones
CN I (name and function)
olfactory
-sensory: smell
CN II (name and function)
optic
-sensory: vision
CN III (name and function)
oculomotor
-motor to muscles of eye
-ANS constrictor/dilator of pupil in pupillary reflex
CN IV (name and function)
trochlear
-motor to muscle of eye: dorsal oblique muscle
CN V (name and function)
trigeminal
-ophthalmic and maxillary branches
-sensory: mandibular branch motor to muscles of mastication
-sensory: to face
CN VI (name and function)
abducent
-motor to eye muscles: lateral rectus and retractor bulbi
CN VII (name and function)
facial
-motor to muscles of facial expression
-sensory: taste, parts of ear
-ANS: glands
CN VIII (name and function)
vestibulocochlear
-sensory: hearing and balance
CN IX (name and function)
glossopharyngeal
-motor: larynx/pharynx
-sensory: pharynx and part of tongue, taste
-ANS: glands
CN X (name and function)
vagus
-motor: larynx/pharynx
-sensory: larynx, thoracic and GI viscera
-ANS: thorax, abdomen
CN XI (name and function)
accessory
-motor to some neck muscles
CN XII (name and function)
hypoglossal
-motor to tongue
Cerebrum contains which CN
CN 0, CN I
Diencephalon contains which CN
CN II
Midbrain contains which CN
CN III, CN IV
Pons contains which CN
CN V
Medulla contains which CN
CN VI, CN VII, CN VIII, CN IX, CN X, CN XI, CN XII
What does the sphenoid bone complex contain?
-optic canal
-orbital fissure
-rostral and caudal alar foramen
-oval foramen
Which CN exit through optic canal?
CN II
Which CN exit through orbital fissure?
CN III, CN IV, CN V (ophthalmic), CN VI
Which CN exit through rostral alar foramen/round foramen?
CN V (maxillary)
Which CN exit through oval foramen?
CN V (manibular)
Which CN?
-receptors in vomeronasal organ
-pheromones enter the incisive ducts located on either side of the incisive papilla
-vomeronasal nerves travel through cribriform plate to the accessory olfactory bulb
CN 0
Which CN?
-receptors are in olfactory epithelium of caudal nasal passages
-axons pass through the cribriform plate to the olfactory bulbs
CN I
Which CN?
-receptors in retina
-enters optic canals
-cross at optic chiasm
CN II
Which CN?
-motor to muscles that move the eye
-passes through orbital fissure
CN III
Which CN?
-motor to superior (dorsal) oblique muscle of eye
-passes through orbital fissure
CN IV
