Cranial Nerves- Ganglion/Central Connection

Question 1

Olfactory nerve - CN I - main central nervous system connection

Answer 1

primary neurons in nasal mucosa synapse with secondary neurons in the olfactory bulb —> axons go to form the olfactory tract (medial temporal lobe)

** sensory information about smell is brought to the CNS

Question 2

Optic nerve- CN II- main central nervous system connection

Answer 2

lateral geniculate nuclei

Question 3

Oculomotor nerve- CN III - ganglion-central connection

Answer 3

Preganglionic parasympathetic axons of oculomotor nerve synapse on cell body in the ciliary ganglia–> postganglionic parasympathetic axons

Question 4

trochlear - CN IV ganglion/central connection

Answer 4

NONE

Question 5

trigeminal, ophthalmic, CN V1 - ganglion/main central connection

Answer 5

trigeminal sensory nucleus

Question 6

trigeminal, maxillary n.- CN V2- ganglion/main central connection

Answer 6

trigeminal sensory nucleus

Question 7

CN V3- Trigeminal, mandibular n.- ganglion/main central connection

Answer 7

sensory- trigeminal sensory nucleus

branchial motor - NONE

Question 8

CN VI- abducens- ganglion/main central connection

Answer 8

NONE

Question 9

CN VII- Facial n.- Ganglion/Central Connection

Answer 9

branchial motor- NONE

parasympathetic- pterygopalatine ganglion, submandibular ganglion

sensory (including sensory innervation to palate)- trigeminal sensory nucleus

taste (ant 2/3 tongue)- nucleus solitarius

Question 10

CN IX- glossopharyngeal - ganglion/main central connection

Answer 10

branchial motor- NONE

sensory- visceral, touch, proprioception - trigeminal sensory nucleus, nucleus solitarius

taste - nucleus solitarius

parasympathetic- OTIC ganglion

Question 11

What nerve is associated with the otic ganglion and the postganglionic parasympathetic fibers of the lesser petrosal nerve?

Answer 11

auriculotemporal nerve of CN V3–> post para fibers travel with the auriculotemporal nerve to innervate the parotid gland

Question 12

CN X- vagus n.- ganglion/central connection

Answer 12

branchial motor- NONE

preganglionic parasympathetic- synapse with postganglionic neurons in, on, or near viscera (target organ wall)

sensory- touch/proprioception (n/a)

sensory- visceral - superior and inferior ganglion

TASTE- superior and inferior ganglion

Question 13

CN XI- accessory n.- ganglion/main central connection:

Answer 13

NONE

Question 14

CN XII- hypoglossal n. - ganglion/central connection

Answer 14

NONE