Nasal Cavity

Question 1

Bony Origin of the 3 Conchae

Answer 1

Superior and middle: Ethmoid

Inferior: bone in and of itself

Question 2

Sphenopalatine Foramen (location/2 things in it)

Answer 2

Posterior to middle conchae, where pterygopalatine ganglia sits/sphenopalatine nerves come out

Question 3

Structure of Nasal Septum (2.2)

Answer 3

2 Bones: perpendicular plate of ethmoid and vomer underneath that
1 big piece of cartilage: septal cartilage

Question 4

4 Structure off Ethmoid Bone

Answer 4

Crista galli
Perpendicular plate of ethmoid
Superior and middle conchae

Question 5

2 Blood Supply of Nasal Surface (and 1 other point)

Answer 5

Ophthalmic and facial a.s

External-internal carotid anastomosis

Question 6

Vestibule of Nasal Cavity

Answer 6

Smooth area between nostrils and turbinates

Question 7

Superior Meatus (location/content)

Answer 7

Superior to superior turbinate

Posterior ethmoid sinus

Question 8

5 Contents of Middle Meatus

Answer 8

Ethmoid bulla
Hiatus semilunaris (ethmoid infundibulum)
Maxillary sinus
Uncinate process
Frontal sinus

Question 9

Ethmoid bulla

Answer 9

Hill made up of extensions of ethmoid air cells bulging into nasal cavity

Question 10

Hiatus semilunaris (ethmoid infundibulum) (description and function/3 aspects)

Answer 10

Valley b/w ethmoid bulla and uncinate process, where nasal air sinuses drain. Frontal nasal sinus into upper aspect/ethmoid air cells in middle/maxillary sinus into base

Question 11

Inferior Meatus Content

Answer 11

Nasolacrimal duct

Question 12

2 Notable Feature of Maxillary Sinus

Answer 12

When standing up, everything drains into there

Actually has superior drainage point, so might have to tilt head to clear it

Question 13

Sphenoethmoid Recess (location and content)

Answer 13

Most posterior/superior aspect, has sphenoid sinus draining into it

Question 14

Damage to Cribiform Plate Problem

Answer 14

Draining CSF into nose

Question 15

General Sensation to Nasal Septum (2)

Answer 15

Anterior ethmoidal nerve (V1) doing anterior/superior
Nasopalatine nerve (V2) coming through sphenopalatine foramen doing posterior/inferior

Question 16

Sympathetic Innervation to Nasal Cavity (5)

Answer 16

Follow arterial supply to deep petrosal nerve which joins w/ greater petrosal n. to form nerve of pterygoid canal to pterygopalatine ganglion

Question 17

Parasympathetic Innervation to Nasal Cavity (5)

Answer 17

Facial n. to greater petrosal n. which joins deep petrosal n. to nerve of pterygoid canal to pterygopalatine ganglion

Question 18

General Sensation to Septum (2)

Answer 18

Anterior ethmoidal n. (V1)

Lateral nasal n.s (V2)

Question 19

Arterial Supply to Septum (3)

Answer 19

Ethmoidal branches from ophthalmic a. (anterior/superior)
Septal nasal branches from sphenopalatine a. (posterior /inferior)
Septal branch of superior labial a. (just behind nostril)

Question 20

Kiesselbach’s Area

Answer 20

Where ethmoidal branches, septal nasal branches, and septal branch come together behind nostril and create area w/ lots of blood supply where can get nosebleeds easily

Question 21

Lateral Wall Blood Supply (2)

Answer 21

Ethmoidal branches from ophthalmic a.

Lateral nasal branches from sphenopalatine a.

Question 22

Lining of Respiratory Area

Answer 22

Mucoperisoteum

Question 23

Maxillary Sinus (2)

Answer 23

Largest

Drains superiorly into middle meatus

Question 24

Important Maxillary Sinus Relations (2.2)

Answer 24

Orbit - eye can fall into maxillary sinus upon fracture
Maxillary teeth roots project right there so abscesses can spread through sinus to all maxillary teeth, or tooth extractions can open hole into sinus

Question 25

Ethmoid Air Sinuses (3)

Answer 25

4-17 small sinuses
Medial to orbit and lateral nasal cavity
Drain into superior and middle meatus

Question 26

Sphenoid Sinus (4)

Answer 26

Most posterior located
Within sphenoid bone
Drains into sphenoethmoid recess
Easiest access to pituitary

Question 27

Epistaxis

Answer 27

Nosebleeds

Question 28

Geniohyoid M. (location and action)

Answer 28

Run from hyoid to genio tubercle of mandible, just deep to mylohyoid
Move hyoid superiorly during swallowing

Question 29

Geniohyoid m. Innervation

Answer 29

C1

Question 30

Location of Lingual N. (V3) in Oral Cavity

Answer 30

Passes over hyoglossus m. and over submandibular duct

Question 31

3 Kinds of Fibers in Lingual n.

Answer 31

Sensation from anterior 2/3 of tongue
Pregang parasymps (from chorda tympani) to submandibular ganglion
Postgang parasymps from submandibular ganglion to sublingual gland

Question 32

Mylohyoid Nerve (3)

Answer 32

Branch of inferior alveolar n. that supplies mylohyoid m. and ant. belly of digastric m.

Question 33

Hypoglossal n. (XII) damage

Answer 33

Stick tongue out, points to side of damage

Question 34

Tongue Muscle Innervation

Answer 34

All “glossus” muscles innervated by XII except palatoglossus innervated by X

Question 35

Hypoglossal n. location

Answer 35

B/w hyoglossus and mylohyoid m.s at inferior border

Question 36

4 Branches of Lingual a. (and where)

Answer 36

Suprahyoid branch before it goes under hyoglossus m.
Dorsal lingual a.s deep to hyoglossus
Terminates into sublingual and deep lingual a.s

Question 37

Isthmus of the Fauces

Answer 37

Opening b/w oral cavity and oropharynx

Question 38

Layout of Teeth

Answer 38

2 incisors, 1 canine, 2 premolars, 3 molars per 1/2 jaw

Question 39

Sulcus Terminalis

Answer 39

Little impression in back of tongue that was embryological origin site of thyroid gland

Question 40

Styloglossus m.

Answer 40

Runs from styloid to kind of lateral side of hyoglossus

Question 41

Genioglossus m.

Answer 41

Big muscle running from genoid tubercle of hyoid to tongue

Question 42

Base/Epiglottis Sensory

Answer 42

Vagus does general sensation and taste

Question 43

Arterial Supply of Tongue (2)

Answer 43

Dorsal lingual a. and deep lingual a.