The lateral view of a carotid angiogram shows the tortuous path of the internal carotid and its division into anterior and middle cerebral arteries (both vessels fill simultaneously but are shown separately here to show their distribution without overlap). The anterior cerebral courses above the corpus callosum. The middle cerebral fans out over the insula and then out from the Sylvian fissure, forming a "candelabrum" effect.
The lateral view of the posterior/vertebrobasilar circulation shows the vertebrals forming the basilar artery, then diverging into posterior cerebrals. Cerebellar branches arise from the vertebrals and basilar.
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