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12 Cards in this Set
- Front
- Back
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Fast searching or scanning VOLUNTARY eye movements are called _
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SACCADES
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Slower tracking INVOLUNTARY eye movement is called _
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Smooth pursuit
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Near triad includes
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Convergence - mediated by MR muscles via CN III
Accomodation - contraction of ciliary muscle results in thickening of lens and increase in refractive power - mediated by Edinger- Westphal nucleus Pupillary constriction - EW nucleus CN III |
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Horizontal gaze center is located in _
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Paramedian pontined reticular formation (excitatory burst neurons, inhibitory burst neurons and nucleus prepositus hypoglossi)
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Input to PPRF is from _
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Superior colliculus and frontal eye field
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Vertical gaze center is located in _
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Rostral interstitial nucleus of MLF
Interstitial nucleus of Cajal |
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Patient is asked to look right - left eye normal, right eye didnt move - what is damaged
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CN VI on the right
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Patient is asked to look left - left eye normal, right eye looks down instead of left - what is damaged
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CN III on the right
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Patient is asked to look left and then down - left eye normal, right eye looks left but doesnt look down - what is damaged
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CN IV on the right
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The eyes of comatose patient are deviated to the right - what is damaged
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Destructive lesion of R frontal eyefield
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Patient is asked to look up but is unable to do so, also cannot converge - where is the lesion
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Paralysis of vertical (upward gaze) amd convergence - PARINAUD SYNDROME
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MLF syndrome or internuclear ophthalmoplegia is a condition where there is damage to _
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MLF between abducent and oculomotor nuclei
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