Oculomotor nerve palsy: Difference between revisions
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==Overview== | ==Overview== | ||
Damage to the [[oculomotor nerve]], termed '''oculomotor nerve palsy''' is known by the '''down n' out''' symptoms. | Damage to the [[oculomotor nerve]], termed '''oculomotor nerve palsy''' is known by the '''down n' out''' symptoms. | ||
==Causes== | |||
==Pathophysiology== | ==Pathophysiology== | ||
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===Physical Examination=== | ===Physical Examination=== | ||
====Neurology==== | ====Neurology==== | ||
*The affected eye looks downward and outward | |||
[[File:Thirdnervepalsy.gif]] | |||
*[[ptosis (eyelid)|Ptosis]], or drooping of the [[eyelid]], because the [[levator palpebrae superioris muscle]] (eyelid lifting muscle) is innervated by the [[oculomotor nerve]]. | *[[ptosis (eyelid)|Ptosis]], or drooping of the [[eyelid]], because the [[levator palpebrae superioris muscle]] (eyelid lifting muscle) is innervated by the [[oculomotor nerve]]. | ||
*[[Strabismus]] | *[[Strabismus]] | ||
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[[Category:Neurology]] | [[Category:Neurology]] | ||
[[Category:Physical examination]] | [[Category:Physical examination]] | ||
{{Eye pathology}} | {{Eye pathology}} |
Latest revision as of 13:40, 11 June 2015
Oculomotor nerve palsy | |
ICD-10 | H49.0 |
---|---|
ICD-9 | 378.52 |
DiseasesDB | 2861 |
MeSH | D015840 |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Damage to the oculomotor nerve, termed oculomotor nerve palsy is known by the down n' out symptoms.
Causes
Pathophysiology
The affected eye looks downward, because the superior oblique (innervated by cranial nerve IV), is unantagonized by the paralyzed superior rectus and inferior oblique and looking outwards, because the lateral rectus (innervated by cranial nerve VI) is unantagonized by the paralyzed medial rectus.
Diagnosis
Physical Examination
Neurology
- The affected eye looks downward and outward
- Ptosis, or drooping of the eyelid, because the levator palpebrae superioris muscle (eyelid lifting muscle) is innervated by the oculomotor nerve.
- Strabismus
External links
- Animation at mrcophth.com