Step I which CN?

Started by purplelife
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purplelife

purplelife

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is responsible for turning eye downward and laterally? Is it trochlear or oculomotor?
 
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GrabSlamBoot said:
I thought the eye turning down and out was due to superior oblique damage so CN 4 trochlear
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I thought if CN 4 -SO- gets lesioned then you get eye turning up not down and out? lol.. If it's down and out that would be CN 3? I don't know if this is right. I'm getting more confused now.
 
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purplelife said:
I thought if CN 4 -SO- gets lesioned then you get eye turning up not down and out? lol.. If it's down and out that would be CN 3? I don't know if this is right. I'm getting more confused now.
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If CN 3 gets damaged then the eye goes down an out because the only one still working is SO, CN 4.
 
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CN4 injury leaves them with a hypertropia and externally rotated eye.

Can present with a head tilt contra lateral to affected side. (And chin tilt)
 
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