Thalamogeniculate (inferolateral) artery originates from the P2 segment of the PCA
– supplies multiple thalamic nuclei including the medial geniculate nucleus (MGN) 

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Posterior choroidal artery arises from P2 segment of the PCA and supplies the lateral geniculate nucleus (LGN)

Polar artery originates from the PCOM 

Paramedian artery originates from the P1 segment of the PCA