Figure 1From: An excess vessel in the posterior part of the human cerebral arterial circle (CAC): a case series Modified scheme [14] of the presence of vascular "bridge" in the posterior part of cerebral arterial circle (CAC). Some vascular components are named: PCA, two posterior cerebral arteries; BA, basilar artery; ICA-C4, internal carotid artery, cerebral part; A1, anterior cerebral artery, pre-communicating part; M1, middle cerebral artery, sphenoid part.Back to article page