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Questions and Answers
Which ethmoidal sinus opens onto the hiatus semilunaris?
Which ethmoidal sinus opens onto the hiatus semilunaris?
- Anterior (correct)
- Middle
- Posterior
- Lateral
What is the largest of the sinuses?
What is the largest of the sinuses?
- Maxillary sinuses (correct)
- Ethmoidal sinuses
- Sphenoid sinuses
- Frontal sinuses
Which nerve branches provide innervation to the ethmoidal sinuses?
Which nerve branches provide innervation to the ethmoidal sinuses?
- Optic nerve branches
- Frontal nerve branches
- Vagus nerve branches
- Nasociliary nerve branches (correct)
Where does the posterior ethmoidal sinus open?
Where does the posterior ethmoidal sinus open?
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Which arteries supply blood to the ethmoidal sinuses?
Which arteries supply blood to the ethmoidal sinuses?
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Study Notes
Ethmoidal Sinuses
- Comprise three distinct sinuses: anterior, middle, and posterior, each located within the ethmoid bone.
- Anterior Ethmoidal Sinus: Drains into the hiatus semilunaris in the middle meatus.
- Middle Ethmoidal Sinus: Opens onto the lateral wall of the middle meatus.
- Posterior Ethmoidal Sinus: Drains into the lateral wall of the superior meatus.
- Innervation derives from anterior and posterior ethmoidal branches of the nasociliary nerve and the maxillary nerve.
- Blood supply is provided by the anterior and posterior ethmoidal arteries.
Maxillary Sinuses
- Largest among the paranasal sinuses, located laterally and slightly inferior to the nasal cavities.
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Description
Explore the anatomy of the ethmoidal sinuses, including their location and connections. Learn about the innervation and arterial supply of the anterior, middle, and posterior ethmoidal sinuses. This quiz is designed to enhance your understanding of sinus anatomy in the context of the ethmoid bone.
