Cedrick
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A 48 year old man comes to his physician because his wife noticed that his right pupil is "small"
physical examination shows that the right pupil is contricted and does not react to light
his left pupil is normal
these findings are most likely due to alesion involving which of the following structures on the right ?
a.-cerviacl spinal cord
b.-frontal eye fields
c.-lateral geniculate nucleus
d.-optic tract
e.-visual cortex
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| study_ing
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a. the pt has horner's
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| muzammil
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a definitly
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| muzammil
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i think all the other option produce a dilated pupil
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| Cedrick
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A.-the spinal cord ?
D.-optic tract
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| study_ing
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A the spinal cord. if the optic tract were involved, there wud be constriction when light was shone in the left eye
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| Cedrick
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Yo check this one out
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| muzammil
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i think optic track dmage will cause a blind eye and blind eye is dilated normally but it constrict when light is shown to the normal eye as the consensual light reflex is positve
cervical apinal cord damge causes damage to descending hypothalmic fibre which cause horner syndrome as ther fibres cause outflow from lateral horn sypathetic neuron
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| Cedrick
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Found on an old post
correct A
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| Cedrick
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next
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| study_ing
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sorry to nag but
THIS IS A CONCEPT an old teacher really emphasized on...kill one afferent pathway, mutiple scleroze it , chop of its nerve, try whatever u can
but an AFFERENT pathway defect never cozes anisocoria ..coz the opp's eye input maintains the pupil and the effernet path is intact
.... .remember newbies 
( god bless him, he used to be so boring..)
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| waqastariq
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cervical spinal cord
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| Cedrick
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A.-cervical spinal cord
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