Visual pathway anatomy from retina to occipital cortex and the visual field defect tied to a lesion at each level, tested on the NBEO.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- A lesion of the optic nerve causes what visual field defect?
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Monocular vision loss in the eye on the same side as the lesion- Where do retinal ganglion cell axons converge to exit the eye?
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The optic disc- What retinal layer is formed by the axons of retinal ganglion cells?
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The nerve fiber layer- Which retinal fibers decussate at the optic chiasm?
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Nasal retinal fibers- Which retinal fibers remain uncrossed at the optic chiasm?
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Temporal retinal fibers- A lesion at the optic chiasm classically causes what visual field defect?
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Bitemporal hemianopia- A pituitary adenoma typically compresses the chiasm from which direction?
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From below- Because a pituitary adenoma compresses the chiasm from below, which bitemporal field is affected first?
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The superior bitemporal field- A craniopharyngioma typically compresses the chiasm from which direction?
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From above- Because a craniopharyngioma compresses the chiasm from above, which bitemporal field is affected first?
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The inferior bitemporal field- Where is a junctional scotoma lesion located?
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At the junction of the optic nerve and the optic chiasm- What visual field pattern does a junctional scotoma produce?
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An ipsilateral central scotoma plus a contralateral superior temporal field defect- What is Wilbrand's knee?
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A small loop that contralateral inferior nasal retinal fibers make into the opposite optic nerve just before joining the chiasm- A lesion of the optic tract causes what visual field defect?
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Incongruous homonymous hemianopia- The optic tract carries visual information from which part of each eye's visual field?
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The contralateral visual field of both eyes
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