Fig. 3

Neurovascular anatomical variants supplying paramedian thalamus and mid brain as was described by Percheron [10]. (Adapted from, Artery of Percheron infarction: review of literature with a case report. Radiology and oncology. 2015 Jun 1;49 (2):141–6.Written permission was obtained from the author and the journal to use as an open access figure). a Variant I - each side perforating arteries arising from each PCA. b Variant IIa - asymmetrically arising two perforating arteries from one sided PCA. c Variant IIb - bilateral thalamic perforating arteries arising from a single common trunk (AOP). d Variant III - an arc bridging P1 segments of bilateral PCA giving rise to several perforating arteries. Vessels marked by initials: AICA - anterior inferior cerebellar artery, AOP - artery of Percheron, BA - basilar artery, MP - midbrain perforators, PCA – posterior cerebral artery, SCA - superior cerebellar artery, TP - thalamic perforators