Nose, Nasal Cavities and Paranasal Sinuses Flashcards
(30 cards)
What makes up the Bony part of the External Nose Structure?
Nasal part of Frontal Bone
Nasal Bone
Frontal process of Maxilla
What makes up the Cartilaginous part of the External Nose Structure?
Hyaline Cartilage
2 Lateral Cartilages
2 Major Alar Cartilages
1 Septa Cartilage
What are the boundaries of the Nasal Cavity
- Roof:
- Frontal
- Nasal
- Ethmoid
- Body of Sphenoid
- Floor
- Hard Palate
- Palatine Process of Maxilla
- Horizontal plates of the Palatine Bone
- Hard Palate
- Medial Wall
- Nasal Septum
- Bony Part
- Cartilaginous Part
- Nasal Septum
- Lateral Wall
- Nasal Conchae
What makes up the Hard Palate
- Anterior = Palatine Process of Maxilla
- Posterior = Horizontal Plates of Palatine
What makes up the bony part of the Nasal Septum?
- Perpendicular Plate of ethmoid
- Vomer
- Nasal Crest of Maxillary Bone
- Nasal Crest of Palatine Bone
What are the 5 spaces that the Nacsal Cavity is divided into?
Sphenoethmoidal Recess (Superomedial)
3 Nasal Meati
Common Nasal Meatus (Medially)
What concha lie independently and which are part of another bone?
Superior and Middle: Ethmoid
Inferior: Independent
Explain the Vasculature of the Nasal Cavity
Artierial Supply (Medial and Lateral Walls)
- Anterior Ethoidal Artery
- from Opthalmic A.
- Posterior Ethmoidal Artery
- from Opthalmic A.
- Spehnopalatine Artery
- from Maxillary A.
- Greater Palatine Artery
- from Maxillary A.
- Septal branch of Superior labial Artery
- from Facial A.
Venous Drainage
- Sumucosal plexus deep to mucosa
- Drains into:
- Sphenopalantine Vein
- Facial Vein
- Ophthalmic Vein
Explain the innervation of the Anterosuperior part of the Nasal Cavity
Anterior Ethmoidal Branch of Nasociliary Nerve (from V1)
Posterior Ethmoidal Branch of Nasociliary Nerve (from V1)
Explain the innervation of the Posteroinferior part of the Nasal Cavity
- Nasal Septum:
- Nasopalatine Nerve (from V2)
- Lateral Wall:
- Posterior Superior Lateral Nasal Branch
- Of Greater palantine Nerve (of V2)
- Inferior Lateral Nasal Branch
- Of Greater palantine Nerve (of V2)
- Posterior Superior Lateral Nasal Branch
Explain the innervation of the External Nose
Dorsum and Apex
- Infratrochlear Nerve (of V1)
- External Nasal Branch
- From the Anterior Ethmoidal Nerve (of V1)
Explain the Olfactory sensation of the nose
Olfactory Nerve (from cells in the Olfactory Epithelium)
Passes through the Cribriform Plate to Synapse on “olfactory bulb”
What is the innervation of the Frontal Sinuses?
Ophthalmic Nerve (V3)
What is the position of the Frontal Sinuses?
Posterior to:
- Supercilary arches
- Root of Nose
Explain the drainage of the Frontal Sinus
- Frontonasal Duct
- Into Ethmoidal Infundibulum
- Opens into Semilunar Hiatus
- Of the Middle Nasal Meatus
What is the Ethmoidal Sinus formed by
Invaginations of the Superior and Middle Nasal Meatus into the Ethmoid Bone.
What are the parts of the Ethmoidal Sinus?
Anterior, Middle and Posterior Air Cells
Explain the drainage of the Ethmoidal Sinus
Anterior: Via Ethmoid infundibulum into Middle Nasal Meatus
Middle: Middle Meatus
Posterior: Superior Meatus via the Sphenoethmoidal Recess
What is the innervation of the Ethmoidal Sinus?
- Anterior and Posterior Ethmoidal Branches
- Of Nasociliary Branch (of V1)
Explain the drainage of the Spenoidal Cells
Drain into Sphenoethmoidal Recess which drains into the Superior Nasal Meatus
What is the blood supply of the Sphenoidal Cells
Posterior Ethmoidal Artery
What is the innervation of the Sphenoidal Cells
Branch of the Nasociliary Nerve (of V1)
What are the borders of the Maxillary Sinus
- Apex
- Extends towards zygomatic one
- Base
- Forms inferior part of lateral walll of nasal cavity
- Roof
- Floor of orbit
- Floor
- Alveolar part of Maxilla
Explain the drainage of the Maxillary Sinus
- Drains via multiple openings (ostia)
- Drains into Middle Nasal Meatus via the Semilunar Hiatus
