Nasal Cavity
What bones are included in the bony part of the nose?
- 2 nasal bones - Maxillary - Frontal
What does the nasal cavity receive blood from?
- Anterior and posterior ethmoidal arteries (ophthalmic) - Lateral nasal and superior labial arteries (facial) - Sphenopalatine (maxillary)
Anterior and posterior ethmoidal innervation and what they are accompanied by
- Anterior/superior parts of lateral wall - Septum of nasal cavity - Anterior and posterior ethmoidal arteries
The nasal cavities extends from the ______ to the ______
- External nares - Choanae
Tears drain into ______ via ______
- Inferior meatus - Nasolacrimal duct
The _____ wall of nasal cavity is smooth anteriorly but the posterior ____ has __ projections: ________
- Lateral - 2/3 - 3 - Superior conchae - Middle conchae - Inferior conchae
Paranasal air sinuses - Function
- Lighten the weight of the skull - Increase resonance of the voice
Besides the conchae, what else forms the lateral wall?
- Maxillary bone - Lacrimal bone - Palatine bone
The anterior and posterior ethmoidal nerves are branches of ______ and travel through ______ foramina in the _____
- Nasociliary (ophthalmic v1) - Anterior/posterior foramina - Orbit
3 sensory nerves to nasal cavity and type of axons
- Olfactory (SA) - Ophthalmic (GA) - Maxillary (GA)
What goes through foramina of cribriform plate?
- Olfactory nerve - Anterior/posterior ethmoidal arteries
Glands of nasal cavities receives parasympathetic/sympathetic innervation from which nerve? What type of axons?
- Parasympathetic - Facial (7) - GVE
Nasal septum - Function - What is it made of
- Separates 2 nasal cavities - Cartilage, vomer, ethmoid
Sphenopalatine foramen - Location - What does it contain
- Superior edge of palatine bone - Sphenopalatine artery - Posterior nasal nerve - Nasopalatine nerve - Pharyngeal nerve
The blood vessels of the nasal cavity receive sympathetic/parasympathetic innervation from neurons in the _________ ganglion with ____ axons
- Sympathetic - Superior cervical - GVE
The pharyngeal nerve is a branch of ____ and supplies _____ with ___ (type of axon)
- V2 (maxillary) - Superior half of nasopharynx - GA
The POSTERIOR portion of nasal septum is composed of _______
- Vomer - Perpendicular plate of ethmoid bone
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Anterior middle and posterior ethmoidal air cells drain into ____
Anterior: semilunar hiatus Middle: bulla Superior: superior hiatus
What is the path of the olfactory axons
Bodies/axons of olfactory in mucosa of septum/superior concha --> cribiform plate -> olfactory bulb -> olfactory tract -> brain
Piriform aperture - What is it
Bony opening to the nose
What is the plane of separation between the nasal cavity and nasopharynx?
Choanae
What separates the anterior cranial fossa from the nasal region?
Cribiform plate of ethmoid
The _______ forms the posterior edge of the nasal septum
Free edge of the vomer
What is the posterior limit of the nasal cavities?
Free edge of vomer
Sinusitis cause
Inflammation of mucosa within paranasal air sinuses
Where are the olfactory cell bodies located?
Mucosa of the nasal cavity
External nares - What is it
Nostrils
The cribiform plate is continuous with the _______
Perpendicular plate (ethmoid bone)
Posterior nasal nerve innervation
Posterior and inferior part of lateral wall
Posterior nasal nerve, nasopalatine nerve, pharyngeal nerve, sphenopalatine artery reach the nasal cavity and nasopharynx by going through a communication with the ________
Pterygopalatine fossa (lateral wall of nasal cavity)
Type of neurons in olfactory neurons
SA
Maxillary sinus drains into ____
Semilunar hiatus
The frontal sinus drain into _____
Semilunar hiatus
The sphenoid sinus drains into _____
Sphenoethmoidal recess (superior to superior concha)
The ____ and ____ concha are in the ___ bone
Superior Middle Ethmoid
Where are olfactory axons located?
Superior part of nasal cavity between nasal septum and superior concha
The posterior and nasopalatine nerves are branches of _____ and ____ (type of axon)
V2 (maxillary) GA
The conchae project towards the ______
midline
