-bones and cartilage that divide nasal cavity into right and left
- bony septum is mainly from ethmoid bone and vomer
What are the three functional areas of the nasal cavity
2. respiratory area
3. olfactory area
-CSF can leak into nasal cavity from fracture of cribriform plate.
- Injecting dye into CSF will show up on cotton place in nose.
located in the middle meatus; has openings for secretions from frontal sinus, maxillary sinus and anterior ethmoid air cells
Sphenoethmoidal recess is posterior to ____ and receives secretions from ______
superior concha; sphenoid sinus
-foof forms ___
-opens into middle meatus (via semilunar hiatus)
- roof forms floor of orbit
-innervated by V2
- opens into
- left and right are usually ___
- opens into middle meatus (via semilunar hiatus)
- left and right usually asymmetrical
-innervated by V1
Ethmoid Air cells
-anterior group drain into ___, middle into ___ and posterior into ___
- infection can travel through this to ____
-From 3-18 in number
-Anterior group drain into semilunar hiatus, middle group onto surface of ethmoid bulla and posterior group into superior meatus.
- Innervated by V1
- Infection can travel into orbit
- In the body of the sphenoid bone, under floor of hypophyseal fossa.
- Several important structures in the vicinity of this sinus, including: optic nerve, pituitary gland, cavernous sinus and internal carotid
What are several important structures in the vicinity of the sphenoid sinus
optic nerve, pituitary gland, cavernous sinus and internal carotid arteries.
Arterial supply of nasal cavity
-anterior ethmoidal artery (from ophthalmic artery)
- posterior ethmoidal artery (from ophthalmic artery)
- sphenopalatine artery (from maxillary artery)
- greater palatine artery (from maxillary artery)
- septal branch of superior labial artery (from facial artery)
Anterior ethmoidal artery, posterior ethmoidal artery and sphenopalatine arter
divide into lateral and medial (septal) branches
The anterior part of the nasal septum is the site of an ______ involving all five arteries supplying the septum called ____
anastomotic arterial plexus; Kiesselbach area
anastomotic arterial plexus involving all
five arteries (above) supplying the anterior part of the nasal septum
The nerve supply of the posterior-inferior portion of the nasal mucosa is
mainly from the ______, by way of the ______ to the nasal septum, and ______ and ____branches of the _____ to the lateral wall.
maxillary nerve; nasopalatine nerve; posterior superior lateral nasal; inferior lateral nasal; greater palatine nerve
The nerve supply to the anterior-superior portion of the nasal mucosa is
from the ______ by way of the
ophthalmic nerve (V1); anterior and posterior
ethmoidal nerves, branches of the nasociliary nerve
Most of the external nose is supplied by V1 via the _____ and the _____ branch of the _____ nerve. Alae of the nose supplied by _____
infratrochlear nerve and the external nasal branch of the anterior ethmoidal nerve; Alae is supplied by the nasal branches of the infratrochlear nerve (from V2)
The _______, carries sensation regarding smell from the olfactory epithelium in the roof of the nasal cavity
olfactory nerve (CN I)
What area contains major nerves and blood vessels that supply the nasal cavity, upper jaw and the palate
What allows the infratemporal fossa, middle cranial fossa, nasopharynx, nasal
cavity and oral cavity to communicate?
Borders of the pterygopalatine fossa?
-Posteriorly: pterygoid process of sphenoid bone
- Medially: perpendicular plate of palatine bone
- Superiorly: inferior surface of sphenoid bone
- Laterally: pyramidal process of palatine bone
Pterygomaxillary fissure allows communication of the ____ with _____
pterygopalatine fossa; infratemporal fossa
Sphenopalatine foramen allows communication of the ______ with the _____
pterygopalatine fossa with the nasal cavity
a parasympathetic ganglion of the facial
nerve (CN VII), The parasympathetics are delivered to the nasal cavity, oral cavity and the lacrimal gland in the orbit.
Maxillary division of trigeminal nerve: travels through roof of the
_________. It is carrying sensory information from the _____ and ____
pterygopalatine fossa; nasal and oral
Once the maxillary artery travels through the infratemporal fossa (from posterior to anterior) it dives into the
The sphenopalatine branch of the maxillary artery goes through the ____ to the ______ while the descending
palatine branch travels down to the ____
sphenopalatine foramen to the nasal cavity; palate
Pharyngotympanic (auditory) tube: communication between ____ and _____
middle ear (tympanic) cavity and nasopharynx
Levator veli palatini
muscle that elevates the soft palate during
swallowing. It runs from the cartilage of the pharyngotympanic tube to the
palatine aponeurosis. It is innervated by Vagus Nerve (CN X).
Tensor veli palatini
muscle that tenses the soft palate during swallowing. It runs from the medial pterygoid plate, sphenoid spine and auditory tube
to the soft palate. Its tendon loops around the pterygoid hamulus (of medial pterygoid plate). It is innervated by the Mandibular division of the
Trigeminal Nerve (V3).