Oculomotor nerve palsy
(Redirected from Third cranial nerve palsy)
| 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