Test 3 - Quiz 7 - Head/Neck Innervation

Question 1

CN I has what modality?

And what part of the developmental brain is is apart of?

Answer 1

Special sensory

Telencephalon

Question 2

CN II has what modality?

And what part of the developmental brain is it?

Answer 2

Special sensory

Diencephalon

Question 3

What is the path that the optic nerve takes?

Answer 3

Optic nerve -> chiasm-> tract

*Goes thru optic canal

Question 4

CN III, IV, and VI control what?

Answer 4

Ocular muscles

III- Sup, Inf, Med rectus, lev palpebrae sup, pupillary sphincter, and ciliary

IV - Sup oblique

VI- Lat rectus

Question 5

CN IV has what modality?

And what is special about it?

Answer 5

Somatic motor

Emerges from the dorsal surface, only CN with contralateral nuclei

Question 6

What CN is most susceptible to cavernous sinus thrombosis?

Answer 6

VI

Question 7

CN III has what modalities?

Answer 7

Somatic motor

Visceral motor - pupillary light reflex TEST This is consensual, unless there is damage

Question 8

CN VIII has what modality?

Answer 8

Special sense

Question 9

CN XI controls what 2 muscles?

Answer 9

SCM

Trapezius

*Investing fascia

**Ascends cord up thru magnum, then out jug

Question 10

CN XII has was modality?

Answer 10

Motor only

Where?

Tongue muscles

Question 11

In general, CN V does what? (5)

Answer 11

Mm of mastication
Oral floor muscles
Tensor tympani
Tensor veli palatini
Sensation of the face, forehead, tongue, and bulk of cranial dura

Question 12

V1 - mnemonic and nerves.

Where does it exit?

Answer 12

TENiFssL (Tennis Football League)

Tentorial n.

Ethmoidal nn.

Nasociliary n. (Eyeball)
-Infratrochlear n.

Frontal n. (Orbit)

• Supraorbital
• Supratrochlear

Lacrimal n. (Sensory to lacrimal)

SOF

Question 13

V2 - mnemonic and nerves.

Where does it exit?

Answer 13

PIM[P]Z (PIMPS)
A
M

Post sup alveolar n. (Max sinus)

Infraorbital n. (Infraorbital groove, canal, foramen)

• Ant sup alveolar n. (Max sinus)
• Mid sup alveolar n. (Max sinus)

Meningeal n. (Before rotundum)

[Pterygopalatine Fossa] - GLeN [V] Powell

Zygomatic n. (IOF)

Round

Question 14

Pterygopalatine fossa - mnemonic and nn.

Answer 14

GLeN [V] Powell

Greater petrosal n. - Hard palate (Greater palatine foramen)

Lesser petrosal n. - Soft palate (Lesser palatine foramen)

Nasopalatine n. - Nasal mucosa and hard palate (Sphenopalatine foramen ->incisive foramen)

[Vidian’s n] - Not part of V2, but joins with it

Pharyngeal n. - Nasopharynx (Palatovaginal)

Question 15

V3 - mnemonic and nn.

Where does it exit?

Answer 15

My Boy, MounT MounT Dali Lama And Live In mighty mighty innocence.

Meningeal n.
Buccal n.
Masseteric n.
Tensor veli palatini n.
Med pterygoid n.
Tensor tympani n.
Deep temporal n.
Lat pterygoid n.
Auriculotemporal n.
Lingual n.
Inf alveolar n.
-Mylohyoid n.
-Mental n.
-Incisive n.

OVAL

Question 16

In general, CN VII does what?

Answer 16

Motor to mm of facial expression

Question 17

What is the mnemonic for the nn. from CN VII?

Answer 17

Golly Polly - Greater petrosal
Sure - Stapedius
Cute Today - Chorda tympani

___________________ Stylomastoid Foramen

PA - Post Auricular
D - post Digastric
S - Stylohyoid

___________________ Parotid Gland

To - Temporal
Zanzibar - Zygomatic
By - Buccal
Motor - Mandibular
Car - Cervical

Question 18

What is the route that the greater petrosal takes?

Answer 18

GP hiatus -> Lacerum
-> Here it becomes the n of the pterygoid canal -> Pterygoid canal -> Pterygopalatine fossa -> Lacrimal gland (motor, and hitchhikes with V1 and V2)

Question 19

What is the route that the chorda tympani takes?

Answer 19

IAM -> Mid ear -> Petrotympanic fissure -> Joins with lingual n. -> submandibular ganglion -> Ant 2/3 tongue [taste]

Question 20

CN IX is motor to what?

Answer 20

Stylopharyngeus

Parotid

Question 21

What nerve from CN IX is motor to the parotid gland?

Answer 21

Lesser petrosal

Question 22

What is the route of the lesser petrosal?

Answer 22

Parasympathetic

Tympanic membrane-> Mid ear -> LP hiatus -> Ovale -> Otic gang -> Joins auriculotemporal -> Parotid gland

Question 23

What is CN IX sensory to?

Answer 23

Post 1/3 of tongue

Mid ear mucosa

Ext ear skin

Tympanic membrane

Question 24

What is the special sense of CN IX?

Answer 24

Taste - Post 1/3 of tongue

Baro and chemo of carotid sinus

Question 25

What is CN X motor to?

Answer 25

Pharyngeal constrictors

Laryngeal mm.

Question 26

What is CN X sensory to?

Answer 26

Thorax and ab viscera
Laryngopharynx
Larynx
Taste - Epiglottis
Ext acoustic meatus
Post cranial dura

Question 27

What is CN X special sense to?

Answer 27

Baro and chemo to aortic arch (baro) and aortic body (chemo)

Question 28

In general…

Tongue is what and what is the exception?

Palate is what and what is the exception?

Pharyngeal is what and what is the exception?

Laryngeal is what and what is the exception?

Answer 28

CN XII - Palatoglossus (CN X)

CN X - Tensor veli palatini (V3)

CN X - Stylopharyngeus (CN IX)

CN X - All recurrrent except for Cricothyroideus (Ext sup laryngeal n.)

Question 29

Parasympathetics - Non-general

What nerve, what ganglion, what effector?

CN III
CN VII
CN IX

Answer 29

CN III - Ciliary gang - Eye

CN VII - Pterygopalatine gang - glands
Submandibular gang - glands

CN IX - Otic gang - Parotid

Question 30

Parasympathetics - General

Nerve and ganglion?

CN V
CN VII
CN VIII
CN IX
CN X

Answer 30

CN V - Trigeminal gang

CN VII - Geniculate gang

CN VIII - Vestibular gang
Cochlear gang

CN IX - Inferior gang

CN X - Superior gang