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A Detailed Anatomical Description of a Coiled or a Kinked Internal Carotid Artery in Three Dissected Cadavers

Three human cadavers were found to have a rare internal carotid artery (ICA) anomaly during dissection. The first cadaver presented ICA with coiling anterior to transverse process (TP) of atlas (C1). The other two cadavers presented with kinking patterns around the level of transverse processes of second and third cervical vertebrae (C2–3). Coiling and kinking patterns may represent congenital vascular anomalies, arteriosclerotic pathology or fibromuscular dysplasia and may have some relevance to cerebrovascular disease. Kinking and coiling may create disturbance of the flow of the blood to the brain greater disturbance in the flow of the blood to the brain, and/or occurrence of ectasia and aneurismal dilation in the carotid siphon. The ICA is located in close proximity to the TP of the vertebrae, so that neck movements or injuries may affect the ICA. This anatomical relationship may explain the cause of dizziness or fainting individuals.