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Neuroscience EXAM 3– USA (Latest 2026/2027 Update) Exam Prep with Questions and Verified Answers| 100% Correct| Grade A
Neuroscience EXAM 3– USA (Latest 2026/
2026 Update) Exam Prep with Questions and
Verified Answers| 100% Correct| Grade A
Q: this is the partial crossing of fibers where the optic nerves meet
Answer:
optic chiasm
Q: where do the nasal (medial) retinal fibers (responsible for temporal hemifields of vision)
crossover in the pathway?
Answer:
in the chiasm
Q: these are posterior to the chiasm and carry visual information from ipsilateral hemiretinas of
each eye
Answer:
optic tracts
Q: lesions to these areas result in monocular vision field deficits
Answer:
eye, retina, optic nerve
Q: lesions to this area results in bitemporal visual field deficits
Answer:
optic chiasm
Q: lesions to these areas posterior to the chiasm result in homonymous visual defects (defects in
the same region of the visual field for both eyes)
Answer:
optic tracts, LGN, optic radiations, visual cortex
Q: optic tracts wrap around the ____ laterally to reach the ____ of the thalamus
Answer:
midbrain; LGN
Q: axons of the ganglion cells traveling in optic tracts synapse on neurons in the ___, which
then project to the ____ ____ ____
Answer:
LGN; primary visual cortex
Q: a minority of fibers in the optic tract bypass the LGN to enter the superior colliculus and
pretectal areas of midbrain to form the ____ ___ ____
Answer:
extrageniculate visual pathways
Q: these areas are involved in the pupillary light reflex
Answer:
pretectal areas
Q: lesions of the ipsilateral optic radiations cause what?
Answer:
homonymous defects affecting the contralateral visual field
Q: ipsilateral optic radiations carry info from (contralateral or ipsilateral?) visual fields
Answer:
contralateral
Q: all fibers of optic radiations pass the these lobes
Answer:
parietal and temporal
Q: fibers of the inferior optic radiations arc slightly forward and down into the ____ lobe
forming what?
Answer:
temporal lobe; Meyer's loop
Q: inferior optic radiations carry information from the ___ retina (or the ___ visual field)
Answer:
inferior; superior
Q: lesions to the temporal lobe cause what deficits?
Answer:
contralateral homonymous superior quadrantanapia (pie in the sky) visual field defects
Q: fibers of the superior optic radiations pass just under the ____ lobe
Answer:
parietal lobe
Q: superior optic radiations carry information from the ___ retina (or the ___ visual field)
Answer:
superior; inferior
Q: lesions to the parietal lobe cause what deficits?
Answer:
contralateral homonymous inferior quadrantanopia (pie on the floor) visual field defect
Q: this area of the cortex lies on the upper and lower banks of the calcarine fissure in the
occipital lobe
Answer:
primary visual cortex (B17 - secondary and tertiary visual cortex are B18 and 19)
Q: where do the superior optic radiations project to? inferior optic radiations?
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