Oral-Nasal Flashcards
What is the function of the nasal sinuses and nasal mucosa (both types)
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
–Divisions of the nasal cavities
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
Division of nasal cavity in spaces
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
Blood supply and innervation of the nasal mucosa (respiratory and olfactory)
maxillary, ophthalmic; a little facial a.
CNI, CNV1, CNV2
KIESSBACH Area- 5 aa anastomoses. Nose bleeds, why long and alot.
What are the boundaries and subdivisions of the oral cavity
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
Relationships of the oral cavity–
?
Blood supply of the oral cavity–
Floor/Tongue- Lingual a., branch of ECA
Major extrinsic muscles of the tongue & their actions & innervation–
Extrinisic-Alter position of tongue
Intrinsic- alter shape
Genioglossus-protrudes tonue CNXII
Mylohyoid- supports floor
Innervation of the tongue , be able to name specific branches•
all tongue GSA- Lingual (CNV3), CNXI
GSE- all muscles (except
palatoglossus CNX
all tongue SA-chorda tympani (CNVII)
How does the innervation differ between the anterior 1/3 and posterior 2/3 of the tongue?•
Root Post 1/3 CNIX -taste
Body Ant 2/3- taste touch CNVII, CNV3
What are the vallate papillae and how are they innervated?•
prominent taste buds. CNIX (despite being anterior)
How do you test CN XII?–
Tongue ROM and strength
Lesion of CNXII will cause tonue to lean toward injured side bc ipsilateral genioglossus paralysis.
Be able to describe the presynaptic and postsynaptic pathways for the GVE innervation to all the salivary glands– Parotd, Submandibular, Sublingual
GVEp pre CNIX (lesser petrosal n) synapse it the otic ganglion.
GVEp post-Hitch hike on CNV3 auriculotemporal n to reach parotid
Where do the salivary glands drain?•
Parotid drains into upper 2nd molar
Submandibular
The difference between the hard and soft palates in anatomy, blood supply and innervation–
Palate- greater and lesser palatine a. Maxillary ECA Greater a- hard palate Lesser a. -soft palate
For the pterygopalatine fossa, know:–How it communicates with other regions of the skull
oral cavity nasal cavity cranial fossa, pharynx, orbit
Contents- maxillary artery; branches, CNV2and its branches, pterygopalatine ganglion
What cranial nerve (and which branch) has the presynaptic parasympathetics that will synapse in the pterygopalatine ganglion?
CN VII FACIAL
GreateR Petrosal n.
How do these fiber get to the pterygopalatine ganglion?
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
What are the targets of the postsynaptics, and, how do the postsynaptics reach their targets?
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
ANteriorsuperior Nasal Cavity
SA- Olfactory CN1
GSA- Trigeminal CN V1-ophthalmic
GVEp- FACIAL CNVII to pterygopalitine ganglion
Blood- Ophthalmic a of ICA
Posteriorinferiro Nasal and HARD palate
GSA- Trigeminal CNV2 Maxillary- nasoplatine, greater/lesser palatin nn
GVEp- FACIAL CNVII to pterygopalitine ganglion
Blood-Maxillary a. of ECA- sphenopalatine a
Oral cavity
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
Nasopharynx and Soft palate
GSA-Trigeminal CNV2 Maxillary
GSE- SOFT PALATE- VAGUS CN X
Blood-MAXILLARY A
OROPHARYNX
GSA-GLOSSOPHARYNGEAL N CN IX
SA-GLOSSOPHARYNGEAL N CN IX, INTERNAL
LARYGNGEAL VAGUS
GSE- HYPOGLOSSAL CN XII
Blood-MAXILLARY A.
