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Neuro II- CN IV
Thomadaki Fall 2010
Question | Answer |
---|---|
Origin of CN IV | Trochlear Nucleus - midbrain at level of inferior colliculus, in anterior portion of PAG |
Where does CN IV exit | 2 nerves decussate in superior medullary vellum & exit inferior to inferior colliculi |
Function of CN IV | Extraocular movements [superior oblique muscle] |
Examination for CN IV | Downward & inward eye mvts |
Lesion to CN IV | Diplopia when looking down & in Head tilt to opposite side Cant' walk down stairs |
CN IV exits the skull via the _____ | superior orbital fissure |