Cranial Nerve Locations (ganglia, route, autonomic fibers, etc.)

Question 1

Location of neuron cell bodies:

Motor neurons of CN VII

Answer 1

Pons - Motor nucleus of VII

Question 1

Cranial Nerves with Autonomic function

Location of postganglionic neuron cell bodies:

CN III

Answer 1

Ciliary ganglion (attached to V1)

Question 2

Cranial Nerves with Autonomic function

Location of postganglionic neuron cell bodies:

CN VII to salivary glands (except parotid gland)

Answer 2

Submandibular ganglion (attached to V3)

Question 2

What is the route of the preganglionic fibers of CN X?

Answer 2

With CN X.

Question 3

Location of neuron cell bodies:

Motor neurons of CN IX

Answer 3

Medulla - nucleus ambiguus

Question 3

Location of neuron cell bodies:

Somatic sensory neurons of CN X

Answer 3

Superior ganglion of X

Question 3

Target organ of autonomic fibers from CN IX?

Answer 3

Parotid gland –> salivation

Question 4

Location of neuron cell bodies:

CN IV

Answer 4

Lower midbrain - trochlear nucleus

Question 4

Which cranial nerve passes between posterior cerebral and superior cerebellar arteries?

HINT: aneurysms of these arteries injures this nerve

Answer 4

CN III

Question 5

Target organ of autonomic fibers from CN III?

Answer 5

Sphincter pupillae m. –> Pupil constriction

Ciliary m. –> lens accommodation for near vision

Question 6

Location of neuron cell bodies:

Motor neurons of CN X

Answer 6

Medulla - nucleus ambiguus

(some are “cranial roots” previously associated with CN XI)

Question 7

What is the route of the postganglionic fibers of CN VII to lacrimal gland?

Answer 7

Via zygomaticotemporal n. (V2) and lacrimal n. (V1)

Question 8

Cranial Nerves with Autonomic function

Location of preganglionic neuron cell bodies:

CN III

Answer 8

Upper midbrain - Edinger-Westphal nucleus

Question 8

What is the route of the preganglionic fibers of CN III?

Answer 8

They travel with CN III.

Question 10

Location of neuron cell bodies:

CN XII

Answer 10

Medulla - hypoglossal nucleus

Question 12

Location of neuron cell bodies:

CN XI

Answer 12

Spinal cord - anterior horn of cervical region

Question 14

Location of neuron cell bodies:

Sensory neurons of CN VII

Answer 14

Geniculate ganglion

Question 15

Location of neuron cell bodies:

CN VI

Answer 15

Pons - abducent nucleus

Question 16

Location of neuron cell bodies:

Sensory neurons of Trigeminal Nerve

Answer 16

Trigeminal (semilunar) ganglion

Question 16

Cranial Nerves with Autonomic function

Location of preganglionic neuron cell bodies:

CN X

Answer 16

Medulla - Dorsal motor nucleus of X

Question 17

Location of neuron cell bodies:

CN I

Answer 17

Olfactory epithelium

Question 19

Cranial Nerves with Autonomic function

Location of preganglionic neuron cell bodies:

CN VII to lacrimal gland

Answer 19

Pons - superior salivatory nucleus

Question 19

What is the route of the postganglionic fibers of CN III?

Answer 19

Travel with short ciliary nerves

Question 20

Cranial Nerves with Autonomic function

Location of postganglionic neuron cell bodies:

CN X

Answer 20

Autonomic ganglia near or within walls of target organ (e.g. esophagus)

Question 22

Location of neuron cell bodies: CN III

Answer 22

Upper midbrain - oculomotor nucleus

Question 23

**_Cranial Nerves with Autonomic function_** Location of postganglionic neuron cell bodies: CN VII to lacrimal gland

Answer 23

Pterygopalatine ganglion (attached to V2)

Question 24

Which cranial nerve takes the following route? * emerges near mediane plane at junction of pons & medulla * passes through cavernous sinus & superior orbital fissure * passes within the common tendinous ring from which rectus m.'s originate

Answer 24

CN VI - abducent ...and I suppose CN III does, too

Question 25

What is the route of the postganglionic fibers of CN IX?

Answer 25

Via auriculotemporal nerve

Question 27

Location of neuron cell bodies: CN II

Answer 27

Retina

Question 28

**_Cranial Nerves with Autonomic function_** Location of preganglionic neuron cell bodies: CN VII to salivary glands (except parotid gland)

Answer 28

Pons - superior salivatory nucleus

Question 29

Which cranial nerve takes the following route? * emerges from dorsal aspect of midbrain (only CN to emerge dorsally!) * passes through cavernous sinus & superior orbital fissure * passes **outside** the cocmmon tendinous ring from which rectus m.'s orginate

Answer 29

CN IV

Question 31

Target organ of autonomic fibers from CN VII?

Answer 31

Lacrimal gland & mucosa of nasal cavity, nasopharynx, & palate --\> lacrimation Submandibular and sublingual salivary glands --\> salivation

Question 32

Location of neuron cell bodies: Motor neurons of Trigeminal Nerve

Answer 32

Pons - motor nucleus of V

Question 33

Location of neuron cell bodies: CN VIII

Answer 33

Spiral ganglion (cochlea) Vestibular ganglion

Question 34

What is the route of the preganglionic fibers of CN IX?

Answer 34

* Exit brain w/ CN IX fibers * Pass through tympanic n. and lesser petrosal n.

Question 35

Which cranial nerve takes the following route? * emerges from sides of medulla anterior to olives * passes through hypoglossal canal and curves forward near angle of mandible superior to ansa cervicalis to enter tongue

Answer 35

CN XII

Question 36

Location of neuron cell bodies: Visceral and special sensory neurons of CN X

Answer 36

Inferior ganglion of X

Question 37

What is the route of the preganglionic fibers of CN VII to the lacrimal gland?

Answer 37

* Through nervous intermedius & geniculate ganglion * Via greater petrosal n. to nerve of pterygoid canal

Question 39

True or false? No part of CN XI arise from the medulla.

Answer 39

True. The spinal root represents CN XI in its entirety.

Question 40

Which cranial nerve takes the following route? * emerges near median plane at junction of midbrain & pons * passes between posterior cerebral and superior cerebellar a.'s * passthrough cavernous sinus & superior orbital fissure * passes within the common tendinous ring from which rectus m.'s originate

Answer 40

CN III

Question 41

Target organ of autonomic fibers from CN X?

Answer 41

Smooth muscle & glands of gastrointestinal tract, pulmonary & cardiovascular systems --\> (varies)

Question 42

**_Cranial Nerves with Autonomic function_** Location of preganglionic neuron cell bodies: CN IX

Answer 42

Medulla - inferior salivatory nucleus

Question 43

What is the route of the preganglionic fibers of CN VII to salivary glands?

Answer 43

* Through nervous intermedius (VII) & geniculate ganglion (VII) * Via chorda tympani (VII), it joins lingual n. (V3)

Question 44

**_Cranial Nerves with Autonomic function_** Location of postganglionic neuron cell bodies: CN IX

Answer 44

Otic ganglion (attached to V3)

Question 45

Location of neuron cell bodies: Sensory neurons of CN IX

Answer 45

Superior ganglion of IX