Nose Flashcards
What are the boundaries of the nose?
superior: nasal bone and frontal process of the Maxillary bone
What is the nasal cavity properly?
from the vestibule to the choana openings
What are the boundaries of the nasal cavity?
- Roof
- Lateral wall
- Medial wall
- floor
What are the component of the roof?
Narrowed:
- body of the sphenoid bone
- Cribiform plate of the ethmoid bone
- frontal bone
- Nasal bone
What is the floor
hard palate
What is the medial wall
Nasal septum:
Anterior- Cartilagenous : continuous with the septal cartilage of the external noe
Posterior- Bony : formed by the the bony perpendicular plate of ethmoid (superiorly) and the vomer (inferiorly)
What is the specifity of the Nasal septum?
rich vascularization, little’s area - Kiesselbach, Anastomoses of the ICA, ECA
What are the component of the lateral wall?
- Frontal process of the maxilla
- Lacrimal bone
- Labirynth of the ethmoid bone- The sup and Middle nasal conchae
- Inferior concha
- perpendicular plate of palatine bone
- Medial pterygoid plate of sphenoid
What are the openings of the nasal cavity?
- Anterior: Nares (Nostrils)
- Middle: Nasal Vestibule- hairy
- Posterio: Choanae leading to the nasopharynx
What the other name of nasal conchae
nasal turbinates
the function of the conchae?
warming, humidify, filtrate, and increase the vitesse of the air
What is the nasal meatus?
the area between the nasal conchae and the lateral nasal wall.
What drains into the superior meatus?
- Posterior Ethmoid Sinus
What drains into the Sphenoethmoidal Recess
Sphenoid Sinus
What drains into the Middle Meatus?
Maxillary Sinus
Anterior Ethmoid Sinus
Frontal Sinus
how the frontal sinus drains into the Middle Meatus?
- though the frontonasal duct - prefer to pass anteriorly
how the anterior Ethmoid sinus opens into the Middle meatus
at the top of the sinus, to stop the mucus
What drains into the Inferior Meatus?
Nasolacrimal duct
What is the Osteomeatal Complex?
the primary drainage pathway for the frontal, maxillary, and anterior ethmoid sinuses.
Key structures involved in the osteomeatal complex?
- Uncinate process: opening of the maxillary sinus
- Ethmoid Bulla: big air cell of the ethmoid
- Hiatus Semilunaris
What are the functional walls of the nasal cavity?
- Latral and Floor
What are the two parts of the Nasal mucosa?
- Neurosensitive epithelium: Olfactory mucosa
- Respiratory mucosa
where the olfactory mucosa present?
- roof
- superior part of lateral wall
- superior part of Medial wall
Whare the Respiratory epithelium present?
lower part of nasal cavity
how is the respiratory epithelium?
Pseudostratified, thick, vestibule( peau), ciliated,
Arterial supply?
Internal carotid artery and external carotid artery branches
venous supply?
pas de valve: des autoroutes veineuses
nerve supply?
specific sensation: olfactory nerve
general sensation: trigiminal nerve: ophthalmic (CN V-1), and maxillary nerves (CN V-2).
Autonomic: drainage
