Oral-Nasal

Question 1

What is the function of the nasal sinuses and nasal mucosa (both types)

Answer 1

Respiratory mucosa- warms, moistens and cleans air
Olfactory mucosa- proces olfactory cells form nerve bundls; FILA OLFACTORIA

nasal sinuses- hollow, reduce weight of skull, and resonates voices/sound we make

Question 2

–Divisions of the nasal cavities

Answer 2

Lateral wall-ethmoid
superior, middle, inferior CONCHAE/turbinates/bones

Roof- Cribriform plate of ethmoid

Floor- palatine process of maxilla
horizontal plates of palatine

Septum- perpendicular plate of ethmoid; vomer septal cartilage

Question 3

Division of nasal cavity in spaces

Answer 3

Atrium- anterior continuation of middle meatus.

Vestibule- anterior inferior of atrium, bounded by alar cartilag, hairs

Nares- anterior nasal apertures

Choanae- posterior nasal apertures (connects nasopharnx) end of inf. meatus (groove btwn)

4 divisions- sphenoidmoidal recess
sup. meatus
middle meatus (ethmoidal bulla -semilunar hiatus)
Inf meatus

Question 4

Blood supply and innervation of the nasal mucosa (respiratory and olfactory)

Answer 4

maxillary, ophthalmic; a little facial a.
CNI, CNV1, CNV2

KIESSBACH Area- 5 aa anastomoses. Nose bleeds, why long and alot.

Question 5

What are the boundaries and subdivisions of the oral cavity

Answer 5

Oral vestibule- btwn cheeks and lips

Oral cavity proper- btwn upper and lower dentin

Roof- hard and soft palates (Ant 2/3)

Length- post to palatoglossal folds

Palatoglossal fold/arch/pillars-

Soft palate- post 1/3, uvula, separates nasopharynx from oropharynx

Question 6

Relationships of the oral cavity–

Answer 6

?

Question 7

Blood supply of the oral cavity–

Answer 7

Floor/Tongue- Lingual a., branch of ECA

Question 8

Major extrinsic muscles of the tongue & their actions & innervation–

Answer 8

Extrinisic-Alter position of tongue
Intrinsic- alter shape

Genioglossus-protrudes tonue CNXII

Mylohyoid- supports floor

Question 9

Innervation of the tongue , be able to name specific branches•

Answer 9

all tongue GSA- Lingual (CNV3), CNXI

GSE- all muscles (except
palatoglossus CNX

all tongue SA-chorda tympani (CNVII)

Question 10

How does the innervation differ between the anterior 1/3 and posterior 2/3 of the tongue?•

Answer 10

Root Post 1/3 CNIX -taste

Body Ant 2/3- taste touch CNVII, CNV3

Question 11

What are the vallate papillae and how are they innervated?•

Answer 11

prominent taste buds. CNIX (despite being anterior)

Question 12

How do you test CN XII?–

Answer 12

Tongue ROM and strength

Lesion of CNXII will cause tonue to lean toward injured side bc ipsilateral genioglossus paralysis.

Question 13

Be able to describe the presynaptic and postsynaptic pathways for the GVE innervation to all the salivary glands– Parotd, Submandibular, Sublingual

Answer 13

GVEp pre CNIX (lesser petrosal n) synapse it the otic ganglion.

GVEp post-Hitch hike on CNV3 auriculotemporal n to reach parotid

Question 14

Where do the salivary glands drain?•

Answer 14

Parotid drains into upper 2nd molar

Submandibular

Question 15

The difference between the hard and soft palates in anatomy, blood supply and innervation–

Answer 15

Palate- greater and lesser palatine a. 
Maxillary
ECA
Greater a- hard palate
Lesser a. -soft palate

Question 16

For the pterygopalatine fossa, know:–How it communicates with other regions of the skull

Answer 16

oral cavity
 nasal cavity 
cranial fossa, 
pharynx, 
orbit

Contents- maxillary artery; branches, CNV2and its branches, pterygopalatine ganglion

Question 17

What cranial nerve (and which branch) has the presynaptic parasympathetics that will synapse in the pterygopalatine ganglion?

Answer 17

CN VII FACIAL

GreateR Petrosal n.

Question 18

How do these fiber get to the pterygopalatine ganglion?

Answer 18

Greater pertrosal w/ GVEp pres
meet
DEEP petrosal n. (GVEs post from ICA periarterial plexus)
Both merge become VIDIAN n. I in pterygoid canal)
Canal reach ganglion

Question 19

What are the targets of the postsynaptics, and, how do the postsynaptics reach their targets?

Answer 19

DEEP petrosal n. (GVEs post from ICA periarterial plexus)
VIDIAN n. I in pterygoid canal)
Canal reach ganglion in fossa
The hitchhike on CN V2
Targets:
Lacrimal gland
Glands of nasal cavity
glands of palate.
NOT PAROTID

Question 20

ANteriorsuperior Nasal Cavity

Answer 20

SA- Olfactory CN1

GSA- Trigeminal CN V1-ophthalmic

GVEp- FACIAL CNVII to pterygopalitine ganglion

Blood- Ophthalmic a of ICA

Question 21

Posteriorinferiro Nasal and HARD palate

Answer 21

GSA- Trigeminal CNV2 Maxillary- nasoplatine, greater/lesser palatin nn

GVEp- FACIAL CNVII to pterygopalitine ganglion

Blood-Maxillary a. of ECA- sphenopalatine a

Question 22

Oral cavity

Answer 22

GSA- Trigeminal CN V Mandibular- LINGUAL n

SA- FACIAL VII- chorda tympani n.

Blood- LINGUAL A.

GSE- HYPOGLOSSAL XII

GVEP- FACIAL CNVII to submandibular ganglion

Question 23

Nasopharynx and Soft palate

Answer 23

GSA-Trigeminal CNV2 Maxillary

GSE- SOFT PALATE- VAGUS CN X

Blood-MAXILLARY A

Question 24

OROPHARYNX

Answer 24

GSA-GLOSSOPHARYNGEAL N CN IX

SA-GLOSSOPHARYNGEAL N CN IX, INTERNAL
LARYGNGEAL VAGUS

GSE- HYPOGLOSSAL CN XII

Blood-MAXILLARY A.

Question 25

LARYNX

Answer 25

GSA- VAGUS INTERNAL AND INFERIOR LARYNGEAL N.

GSE- VAGUS EXTERNAL AND INFERIOR LARYNGEAL N.

GVA- INFERIOR LARYNGEAL N.

Blood-SUPERIOR LARYNGEAL A- ECA, AND INFERIOR LARYGNEAL A. SUBLAVIN

Question 26

LARYNGOPHARYNX

Answer 26

GSA- VAGUS INTERNAL LARYNGEAL N.

GSE- VAGUS CNX GLOSSAPHARYNGEAL CNIX

GVA- VAGUS CNX

Blood-SUPERIOR LARYNGEAL A- ECA, AND INFERIOR LARYGNEAL A. SUBLAVIN