Other English forms include the shortening Retha, and the spelling variant Areta. Variant forms of Aretha used in other languages include the Latinized Arethusa and the French Arette. Aretha is rare as a baby name for girls.
Circle of Willis Arteries. 1  anterior cerebral artery. 2  internal carotid artery. 3  posterior communicating artery. 4  posterior cerebral artery. 5  basilar artery. 6  middle cerebral artery. 7  anterior communicating artery (minute connection between the left and right anterior cerebral arteries).
Although incomplete circle of Willis, a structure that protects the supply of blood from arteries to the brain, is actually quite common, it was more frequently observed in study subjects with Migraine with Aura and Migraine without Aura than in the Migraine-free control group.