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The origin and relations of the anterior choroidal artery: an anatomical study

100%

Uz A. , Erbil K. M. , Esmer A. F.

nr 4

269-272

There has recently been an increase in surgical interventions to the inferior temporal lobe. The aim of the present study is to examine the anatomical structure and relations of the anterior choroidal artery, which extends to this region. A mixture of latex and ink was injected into the internal carotid and basilar arteries of 15 brains from fresh cadavers. In 18 out of 30 cases (60%) the anterior choroidal artery arose from the posteroinferior aspect of the internal carotid artery, in 8 (22.2%) from the posterolateral aspect and in 4 (2%) from its anterior part. The diameter of the anterior choroidal artery was 0.94 mm on average (0.7–1.2) and the average distance from the posterior communicating artery was 5.3 mm (3.8–8 mm); its distance to the bifurcation of the carotid was found to be 4.0 mm on average (2.2–8 mm). The cisternal segment of the anterior choroidal artery and the optic tract formed a neurovascular bundle. The branches arising from the plexal segment supply the lateral geniculate body, the thalamus and the optic tract. The resulting knowledge of the neurovascular relations of the anterior choroidal artery provides a safe surgical approach to the inferior temporal lobe.