Which of the following sites is not involved in a posterior cerebral aery infarct?
Correct Answer: Anterior Coex
Description: In 75% of cases, both PCAs arise from the bifurcation of the basilar aery; in 20%, one has its origin from the ipsilateral internal carotid aery the posterior communicating aery; in 5%, both originate from the respective ipsilateral internal carotid aeries.Two clinical syndromes are commonly observed with occlusion of the PCAP1 syndrome: midbrain, subthalamic, and thalamic signs, which are due to disease of the proximal P1 segment of the PCA or its penetrating branches (thalamogeniculate, Percheron, and posterior choroidal aeries)P2 syndrome: coical temporal and occipital lobe signs, due to occlusion of the P2 segment distal to the junction of the PCA with the posterior communicating aery.(Ref: Harrison's 18/e p3286, 3287, 17/e p2525)
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