The image to the right (Figure 1) shows an image of a carotid artery in the neck where it divides into the artery of the external carotid artery (smaller ... the degree of narrowing or "stenosis." CT ...

There are four carotid arteries: the right and left internal carotid arteries and the right and left external carotid arteries. One pair (external and internal) is located on each side of the neck.