Medical Definition of cerebral artery
: any of the arteries supplying the cerebral cortex:a: an artery that arises from the internal carotid artery, forms the anterior portion of the circle of Willis where it is linked to the artery on the opposite side by the anterior communicating artery, and passes on to supply the medial surfaces of the cerebrum—called also anterior cerebral arteryb: an artery that arises from the internal carotid artery, passes along the lateral fissure, and supplies the lateral surfaces of the cerebral cortex—called also middle cerebral arteryc: an artery that arises by the terminal forking of the basilar artery where it forms the posterior portion of the circle of Willis and passes on to supply the lower surfaces of the temporal and occipital lobes—called also posterior cerebral artery
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