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Questions and Answers
What is the primary function of the cribriform plate?
What is the primary function of the cribriform plate?
Which part of the ethmoid bone is responsible for forming the superior portion of the nasal septum?
Which part of the ethmoid bone is responsible for forming the superior portion of the nasal septum?
What is the anatomical significance of the Ethmoid air cells?
What is the anatomical significance of the Ethmoid air cells?
What is the common symptom associated with a fracture of the cribriform plate?
What is the common symptom associated with a fracture of the cribriform plate?
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Which of the following conditions could be caused by a fracture of the ethmoid labyrinths?
Which of the following conditions could be caused by a fracture of the ethmoid labyrinths?
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Which of the following is a potential consequence of a fracture of the cribriform plate?
Which of the following is a potential consequence of a fracture of the cribriform plate?
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What is the name of the bony projection that extends superiorly from the cribriform plate?
What is the name of the bony projection that extends superiorly from the cribriform plate?
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Flashcards
Ethmoid Bone
Ethmoid Bone
A lightweight, spongy bone forming part of the orbital complex and cranial fossa.
Location of Ethmoid Bone
Location of Ethmoid Bone
Located in the paranasal sinuses, forms medial wall of the orbit and separates nasal and cranial cavities.
Cribriform Plate
Cribriform Plate
The roof of the nasal cavity, perforated by olfactory fibers and features the crista galli.
Perpendicular Plate
Perpendicular Plate
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Ethmoid Labyrinths
Ethmoid Labyrinths
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Clinical Relevance 1
Clinical Relevance 1
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Clinical Relevance 2
Clinical Relevance 2
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Ethmoid Sinuses
Ethmoid Sinuses
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Study Notes
Ethmoid Bone
- Originates from the Greek word "Ethmos," meaning sieve, relating to its lightweight, spongy structure.
- A small, unpaired bone, part of the orbital complex.
- Located within the paranasal sinuses.
- Contributes to the medial wall of the orbit and forms part of the anterior cranial fossa.
- Separates the nasal cavity from the cranial cavity.
- Innervation: Anterior and Posterior Ethmoidal Branches.
Features of the Ethmoid Bone
- Composed of four parts:
- Cribriform plate
- Perpendicular plate
- Ethmoid labyrinths
Cribriform Plate
- Forms the roof of the nasal cavity.
- Perforated with numerous olfactory fibers.
- The crista galli projects superiorly from the plate.
Perpendicular Plate
- Forms the superior two-thirds of the nasal septum.
- Descends from the cribriform plate.
Ethmoid Labyrinths
- Large masses located on either side of the perpendicular plate.
- Contain ethmoid air cells, which are the ethmoid sinuses.
Clinical Relevance
- Fracture of the cribriform plate may cause anosmia.
- Ethmoid labyrinth fractures can allow communication between the nasal cavity and orbit, causing orbital emphysema.
- Inflammation can cause rhinosinusitis and potentially rhinorrhea (leakage of cerebrospinal fluid) from one side of the nose.
- Damage to the ethmoid bone can result from infection or facial trauma.
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Description
Explore the anatomy and significance of the ethmoid bone in this quiz. You'll learn about its structure, features, and clinical relevance. Perfect for students studying cranial anatomy and related fields.
