Nose and Paranasal Sinuses Flashcards
External nose is made of (be specific)
Cartilage
Lateral nasal cartilages
greater alar cartilages
Other cartilages
Bony portion of bone made of
Nasal bones
Processes of frontal and maxillae
Nasal cavities communicate with enviornment via
External nare
Spetum of nose made of
Septal cartilage
Perpendicular plate of ethmoid bone
Vomer
Sensory innervation to nasal septum and lateral wall
Opthalmic
Olfactory
Maxillary
Innervation to anterior nasal cavity
Nasociliary branch of ophthalmic nerve
Maxillary branch innervation of nasal…path it takes
Becomes nasalpalatine nerve
Travels through foramen rotundum through pterygopalatine ganglion
Roof of nasal cavity
Nasal bone, frontal bone, ethmoid bone, sphenoid bone
Cribiform plate allows
Passes of olfactory axons to reach olfactory bulb in the cranial cavity
Floor of nasal cavity formed by
Palatine process of maxilla
Horizontal plate of palatine bone
Bones of floor of nasal cavity also form
Hard palate
Inferior meatus
Drainage from nasolacrimal duct that channels tears from conjuctival sac to nasal cavity
Sinuses entering middle meatus
Frontal
Maxillary
Anterior ethmoid cells
Ethmoidal bullae
Protusion of ethmoid air cells that distorts opening of paranasal sinuses into middle meatus
Hiatus semilunaris
Crack through which ethmoidal bullae drain
Superior meatus receives drainage from
Posterior group of ethmoid air cells
Sphenoethmoidal recess is found, drainge of, and what is located there
Superior to superior concha
Sphenoid sinus
Location of CN1
Why have paranasal sinuses?
Increase SA
Lighten skull
Resonance for voice
Nasolacrimal duct mechanism
Tears sweep from superior-lateral and received by puncta…tears then enter lacrimal sac and nasolacrimal duct…these pass into inferior meatus and swept to pharynx
Filia olfactoria
Pass from nasal mucosa through cribiform plate of ethmoid
Shearing of filia olfactoria results in
Leaking of CSF
Superior alveolar nerve passes through
Maxillary sinus
Sinus infection of maxillary sinus can result in
Pain to superior teeth