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21 Cards in this Set
- Front
- Back
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The anterior and posterior ethmoidal foramen allows passage of what structures into the orbit?
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The anterior and posterior ethmoidal arteries.
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What bones are commonly fractured in a blow to the orbit?
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1. The orbital plate of ethmoid.
2. Maxilla in floor of orbit 3. Superior orbital (high impact injury) |
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What are common symptoms of a fracture to the orbit?
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Entrapment of muscle and associated movement.
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What are the eye rotation by oblique muscles?
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"I Love S&M":
Inferior oblique: Lateral eye rotation. Superior oblique: Medial eye rotation. |
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What are the contents of the Superior orbital fissure?
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What are the contents of the superior orbital fissure?
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What are the major nerves running within the superior orbital fissure?
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1. Lacrimal
2. frontal 3. CN4 4. Nasociliary nerve 5. CN6 6. CN3 |
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What vessels run within the superior orbital fissure?
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1. Recurrent meningeal artery
2. Superior opthalmic vein |
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What structures runs through the inferior orbital fissure?
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Inferior ophthalmic vein and V2
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What is the action of the superior rectus muscle?
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Elevation, adduction and intorsion
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What is the action of the inferior rectus muscle?
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Depression, adduction and extorsion
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All of the rectus muscles of the eye originate from what structure?
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Common tendinous ring
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What musles do the superior division of CN3 innervate?
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Levator palpebrae superioris and superior rectus. All other muscles (other then lateral rectus and superior oblique) are innervated by inferior division of III (if muscle is inferior it is probably innervated by inferior division of III.
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What is the action of the inferior oblique muscle?
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Directs the eye up and out and extorts the eye
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What is the action of the superior oblique muscle?
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Directs the eye down and out and intorts the eye.
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What are the actions of superior and inferior rectus?
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The superior rectus directs the eye up and in and the inferior directs the eye down and in.
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Together, the superior rectus and superior oblique have what action?
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Intorsion of the eye.
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Where is the ciliary ganglion located?
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Lateral and posterior to the eye.
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Where do the posterior ethmoidal and anterior ethmoidal nerves exit the orbit?
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Through the anterior and posterior ethmoidal foramen.
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What are the branches of the ophthalmic artery?
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1. Lacrimal
2. Central retinal - pierces optic nerve and feeds the retina 3. Long and short posterior ciliary branches – to the eye 4. Supra-orbital and supratrochlear branches – to the forehead and anterior scalp 5. Anterior and posterior ethmoidal branches – to the ethmoidal sinuses and nasal cavity 6. Dorsal nasal branch – terminal branch to the root of the nose |
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What nerve lays superior to the superior rectus and levator palpebrae superior mm?
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Frontal nerve
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