<prompt> Embolism of posterior cerebral artery leads to memory impairment because of damage toHippocampal gyrusAngular gyrusPremarginal areaSuperior temporal gyrus  <response>: A Hippocampal gyrus Occlusion of the distal PCA causes Infarction of the medial temporal and occipital lobes. Contralateral Homonymous hemianopia with macula sparing is the usual manifestation. Occasionally, only the upper quadrant of visual field is involved. If the visual association areas are spared and only the calcarine cortex is involved, the patient may be aware of visual defects. Medial Temporal lobe and hippocampal involvement maycause an acute disturbance In memory, particularly if it occurs in the dominant hemisphere. 