9 Questions
In ethmoidal sinusitis, erosion through the thin orbital plate of the ethmoid bone can lead to what complication?
Orbital cellulitis
Which ethmoidal air cell group drains into the superior nasal meatus?
Posterior ethmoidal air cells
What nerve innervates the frontal sinus?
Ophthalmic nerve
Which paranasal sinus is the only one that may be present at birth?
Maxillary sinus
Where does the frontal sinus drain into?
Middle nasal meatus
What lies in the maxilla on each side, lateral to the lateral wall of the nasal cavity?
Maxillary sinus
Which type of sinusitis may erode the medial wall of the orbit and cause orbital cellulitis?
Ethmoidal sinusitis
What is the drainage pathway for the middle ethmoidal air cells?
Summit of ethmoidal bulla in middle nasal meatus
Which nerve provides innervation to the ethmoidal sinuses?
Olfactory nerve
Study Notes
Complications of Ethmoidal Sinusitis
- Erosion through the thin orbital plate of the ethmoid bone can lead to orbital complication
Ethmoidal Air Cells
- The posterior ethmoidal air cells drain into the superior nasal meatus
Innervation of Paranasal Sinuses
- The frontal sinus is innervated by the supraorbital nerve
Development of Paranasal Sinuses
- The maxillary sinus is the only paranasal sinus present at birth
Drainage of Paranasal Sinuses
- The frontal sinus drains into the middle meatus of the nasal cavity
Anatomical Relations
- The maxillary sinus lies in the maxilla on each side, lateral to the lateral wall of the nasal cavity
Complications of Sinusitis
- Acute ethmoidal sinusitis may erode the medial wall of the orbit and cause orbital cellulitis
Drainage Pathway of Ethmoidal Air Cells
- The middle ethmoidal air cells drain into the middle nasal turbinate
Innervation of Ethmoidal Sinuses
- The ethmoidal sinuses are innervated by the anterior ethmoidal nerve
Learn about the anatomy of the ethmoidal sinus, including its structure, location, and drainage pathways. Understand the potential complications of ethmoidal sinus infection and its relationship to the orbit.
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