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  #1  
Old 11-21-2011
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Neuro tumor in left parietal lobe

A 55-y-old woman complains of headaches and is subsequently diagnosed as having a tumor localized to the left parietal lobe. In addition to a variety of sensory deficits, further examination also reveals a reduction in her visual fields.
Which of the following is the most likely visual deficit

A.Left homonymous hemianopsia

B.Right homonymous hemianopsia

C.Left upper quadrantanopia

D.Right upper quadrantanopia

E.Right lower quadrantanopia
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  #2  
Old 11-21-2011
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Its either D or E
Id go woth E right lower quadrantopia!
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Old 11-21-2011
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E. right lower quandrantanopsia.... parietal fibers compress upper fibers of the eye pathway resulting in lower quadrant loss....right because beyond optic chiasm the pathway carries contralateral vision
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I would go with E too!
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The answer is: E
Fibers from the left lateral geniculate destined for the upper bank of the calcarine fissure will mediate visual impulses associated with lower quadrants of the right visual fields for both eyes. This deficit is referred to as a right lower quadrantanopia.
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Nervous-System-, Neuroanatomy-, Pathology-, Step-1-Questions

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