Podcast
Questions and Answers
From which language does the name of the Ethmoid bone originate?
From which language does the name of the Ethmoid bone originate?
- Latin
- Greek (correct)
- French
- English
Which of the following describes the structure of the Ethmoid bone?
Which of the following describes the structure of the Ethmoid bone?
- Dense and heavy
- Smooth and solid
- Rigid and inflexible
- Lightweight and spongy (correct)
The Ethmoid bone is best described as which of the following?
The Ethmoid bone is best described as which of the following?
- Small (correct)
- Long
- Paired
- Large
What part of the skull does the Ethmoid bone contribute to?
What part of the skull does the Ethmoid bone contribute to?
In which of these areas is the Ethmoid bone situated?
In which of these areas is the Ethmoid bone situated?
What structure does the Ethmoid bone contribute to the medial wall of?
What structure does the Ethmoid bone contribute to the medial wall of?
Which cranial fossa does the Ethmoid bone form part of?
Which cranial fossa does the Ethmoid bone form part of?
The Ethmoid bone separates the nasal cavity from what?
The Ethmoid bone separates the nasal cavity from what?
Which of the following provides innervation to the Ethmoid bone?
Which of the following provides innervation to the Ethmoid bone?
Which of these is NOT a main part of the Ethmoid bone?
Which of these is NOT a main part of the Ethmoid bone?
Which part of the ethmoid bone forms the roof of the nasal cavity?
Which part of the ethmoid bone forms the roof of the nasal cavity?
What structure projects superiorly from the cribriform plate?
What structure projects superiorly from the cribriform plate?
What does the perpendicular plate contribute to?
What does the perpendicular plate contribute to?
What is contained within the Ethmoid Labyrinths?
What is contained within the Ethmoid Labyrinths?
What condition may result from a fracture of the cribriform plate?
What condition may result from a fracture of the cribriform plate?
An ethmoid labyrinth fracture may lead to communication between which two areas?
An ethmoid labyrinth fracture may lead to communication between which two areas?
What is a potential result from inflammation of the Ethmoid bone?
What is a potential result from inflammation of the Ethmoid bone?
What can Rhinorrhoea following inflammation of the Ethmoid bone cause?
What can Rhinorrhoea following inflammation of the Ethmoid bone cause?
Infection, inflammation, or trauma can cause damage to which of the following bones?
Infection, inflammation, or trauma can cause damage to which of the following bones?
Which of the following scenarios is most likely to damage the ethmoid bone?
Which of the following scenarios is most likely to damage the ethmoid bone?
Flashcards
Ethmoid Bone
Ethmoid Bone
A bone that forms part of the orbital complex.
Medial orbital wall
Medial orbital wall
The Ethmoid bone contributes to what wall of the orbit?
Cribriform Plate
Cribriform Plate
Forms the roof of the nasal cavity.
Crista Galli
Crista Galli
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Perpendicular Plate
Perpendicular Plate
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Ethmoid Labyrinths
Ethmoid Labyrinths
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Anosmia
Anosmia
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Ethmoid labyrinth fracture
Ethmoid labyrinth fracture
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Cerebral spinal fluid
Cerebral spinal fluid
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Study Notes
- The Ethmoid Bone is part of the Cranium
Ethmoid Bone Facts
- The term "Ethmoid" comes from the Greek word "Ethmos," which means sieve
- This name reflects its lightweight and spongy structure
- It's a small, unpaired bone contributing to the orbital complex
Location
- The ethmoid bone resides within the paranasal sinuses
- It contributes to the medial wall of the orbit
- It constitutes part of the anterior cranial fossa
- It separates the nasal cavity inferiorly from the cranial cavity superiorly
- It receives innervation from the Anterior and Posterior Ethmoidal Branches
Ethmoid Bone features
- This bone consists of 4 parts: cribriform plate, perpendicular plate, and ethmoid labyrinths
Cribriform Plate
- This plate forms the roof of the nasal cavity
- Numerous olfactory fibers perforate it
- The crista galli projects superiorly from it
Perpendicular Plate
- It forms the superior two thirds of the nasal septum
- It descends from the cribriform plate
Ethmoid Labyrinths
- These are large masses on either side of the perpendicular plate
- They contain Ethmoid air cells, also known as the Ethmoid sinuses
Clinical Relevance
- A fracture of the cribriform plate may result in anosmia
- An ethmoid labyrinth fracture can cause communication between the nasal cavity and orbit
- This can lead to orbital emphysema
- Inflammation may lead to Rhino sinusitis
- Rhinorrhoea, where cerebral spinal fluid enters the nasal cavity, can be caused by Inflammation
- This results in clear, watery fluid draining from one side of the nose
- Damage to the ethmoid bone can stem from infection, inflammation, or facial trauma
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