Abstract
Origin of labyrinthine artery is important because it influences the presentation of occlusion of anterior inferior cerebellar and basilar arteries. It shows ethnic and geographical variation, but there is no data from black African populations. This study, therefore examined the pattern of origin of labyrinthine artery in adult black Kenyans. Three hundred and fourty six arteries from one hundred and seventy-three formalin fixed brains were examined by dissection at the Department of Human Anatomy University of Nairobi, Kenya. Labyrinthine artery arose from basilar artery in 260 (75.1%); as common trunk with anterior inferior cerebellar artery in 48 (13.9%) and from the latter in 38 (11.0%) of cases. There was no side and gender difference in the pattern of origin. This implies that majority of labyrinthine arteries arise from basilar artery, different from that in oriental, Indo-Asian and Caucasian populations, in which it arises from the anterior inferior cerebellar artery. Preoperative evaluation of basilar artery branching is recommended.Keywords: labyrinthine artery, origin, Kenyan, Basilar, AICA
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