Nasal Cavity and Paranasal Sinuses

What forms the anterior nasal septum

Septal cartilage

What expands laterally from septal cartilage?

lateral nasal cartilages

What forms the shape of the anterior nostrils?

Alar cartilages

What completes the posterior/lateral shape of the nostrils?

Alar fibrofatty tissue

What forms the anterior part of the roof of the nasal cavity?

Nasal and frontal bones

What forms the central part of the roof of the nasal cavity?

Cribriform plate of ethmoid bone

What forms the posterior part of the roof of the nasal cavity?

Body of the sphenoid bone

What forms the anterior 3/4 of the floor of the nasal cavity?

Palatine process of maxilla

What forms the posterior 1/4 of the floor of the nasal cavity?

Horizontal plate of palatine bone

What does the cartilaginous anterior wall of the nasal cavity form?

Vestibule and atrium

What is the bony part of the anterior portion of the lateral wall of nasal cavity?

Frontal process of maxilla and lacrimal bone

What forms the bony middle portion of the lateral wall of the nasal cavity?

Superior, middle, and inferior conchae

What forms the bony posterior portion of the lateral wall of the nasal cavity?

The perpendicular plate of the palatine bone

What forms the anterior aspect of the nasal septum?

Septal cartilage

What forms the superior aspect of the nasal septum?

Perpendicular plate of the ethmoid bone

What forms the inferior aspect of the nasal septum?

Vomer bone and nasal crest

The nasal crest is formed from what bones?

Maxilla and palatine bones

Where does the frontal sinus drain?

Into the infundibulum via frontonasal duct/canal (middle meatus)

What passage is found in the anterior/superior portion of hiatus semilunaris?

Infundiubulum

Where does the maxillary sinus drain?

Through the maxillary ostium (opening) to the hiatus semilunaris (middle meatus)

The roots of upper teeth may project into which sinus?

Maxillary sinus

Which ethmoid air cells are found anterior to the ethmoidal bulla?

Anterior cells

Which ethmoid air cells are found lateral to the ethmoidal bulla?

Middle cells

Which ethmoid air cells are found lateral to the superior nasal concha?

Posterior cells

Where do anterior ethmoid air cells drain?

Through hiatus semilunaris (middle meatus) via anterior ethmoidal openings

Where do middle ethmoid air cells drain?

Through hiatus semilunaris [actually on ethmoidal bulla] (middle meatus) via middle ethmoidal openings

Where do posterior ethmoid air cells drain?

To the superior meatus via posterior ethmoidal openings.

What sinus is located inferior/anterior to sella turcica/

Sphenoid sinus

Where does the sphenoid sinus drain?

To the sphenoethmoidal recess via the sphenoidal opening

Where is the sphenoethmoidal recess found?

Just posterior/superior to superior nasal concha

What connects the orbit with the nasal cavity?

Nasolacrimal canal

Where does the nasolacrimal duct drain?

Inferior meatus via the opening of nasolacrimal duct

What artery supplies the upper anterior septum and lateral wall?

Anterior ethmoidal branches

What artery supplies the upper posterior septum and lateral wall?

Posterior ethmoidal branches

What artery supplies the lower septum and lateral wall?

Sphenopalatine branches

Where do the venous plexuses of the nasal cavity drain?

Into vv. corresponding to nasal aa. followed by the pterygoid plexus of vv., superior ophthalmic, and facial vv.

What provides special sensory innervation for the nasal cavity?

Olfactory nerve

What nerve components pass up through cribriform plates?

Nerve filaments

What nerve components receive nerve filaments?

Olfactory bulbs

What nerve components pass posterior to olfactory cortex of brain?

Olfactory tracts

What provides parasympathetic nerve supply of the nasal cavity?

CN VII>Geniculate ganglion>greater petrosal nerve>pterygopalatine ganglion (distributed to nasal, lacrimal, and palatal glands)

What provides sympathetic nerve supply of the nasal cavity?

T1-T2>Internal carotid nerve>Deep petrosal nerve>Joins greater pertrosal nerve to form vidian nerve of pterygoid canal>pterygopalatine ganglion>distributed to nasal arterioles and sinusoids

What supplies most of the neasal cavities general sensation?

Branches of maxillary nerve V2

What provids general sensation to the paranasal sinuses?

Branches of CN V2

What provides parasympathetic innervation of the paranasal sinuses?

Greater petrosal branches (CN VII)

What provides sympathetic innervation of the paranasal sinuses?

Deep petrosal branches (T1-T2)