Nasal Cavity Flashcards
Three regions of nasal cavity
Nasal vestibules
Respiratory region
Olfactory region
Medial wall of nasal cavity
Septal cartilage
Vomer
Perpendicular plate of ethmoid bone
Roof of the nasal cavity
Nasal bone Ethmoid bone Frontal bone Sphenoid bone Vomer Medial plate of pterygoid
Lateral wall of nasal cavity
Ethmoid Sphenoid Frontal Nasal Maxillary Palatine Lacrimal Inferior conchae Vomer
Key cartilages of the nose
Lateral septal cartilage
Major alar cartilage
Minor alar cartilage
Where does sphenoidal sinus drain into
Above superior turbinate (spheno-ethmoidal recess)
Where do posterior ethmoid cells drain
Between superior and middle turbinate
Which sinuses open up between middle and inferior turbinate bones
Middle (ethmoidal bula) and anterior ethmoid cells
Frontal sinus
Maxillary sinus (semilunar hiatus)
Which sinus drains inferior to inferior conchae?
Nasolacrimal duct
Innervation of sinuses
Frontal V1
Maxillary V2
Ethmoidal cells V1 V2
Sphenoid V1 V2
Gateways into nasal cavity
Cribriform plate
Sphenopalatine foramen
Incisive canal
Small foramina of lateral wall
Lymph and venous drainage of nasal cavity
Lymph-submandibular
Venous- pterygoid plexus
Arterial supply
Sphenopalantine (posterior)-epistaxis danger
Superior labial artery (anterior)
Greater palantine artery (anterior)
Posterior and anterior ethmoid arteries (superior)
Anastomose at Little’s area
Nerve supply nasal cavity
Olfactory area-olfactory nerve
Vestibular area- Infraorbital nerve
Respiratory area-anterior ethmoidal, anterior superior alveolar nerve and posteriorly pterygopalantine ganglion and greater palantine
Pointy bit on top of middle of ethmoid bone
Crista galli
