Keyhole-shaped visual field defect is seen in a lesion involving which of the following regions?
ALesion of the lateral geniculate body
BLesion of the optic disk
CLesion of the optic chiasma
DLesion of the occipital lobe
Which of the following events does NOT occur in rods in response to light
AOpening of Na+ channels
BActivation of transducin
CStructural changes in rhodopsin
DDecreased intracellular cGMP
A patient presents with sudden onset vision loss and is diagnosed with occlusion of the posterior cerebral artery. Which part of the brain is most affected?
AFrontal lobe
BParietal lobe
CTemporal lobe
DOccipital lobe
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