TY - JOUR T1 - Bilateral Persistence of Type 1 Proatlantal Arteries: Report of a Case and Review of the Literature JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1622 LP - 1624 VL - 25 IS - 9 AU - Terman Gumus AU - Baran Önal AU - Erhan T. Ilgit Y1 - 2004/10/01 UR - http://www.ajnr.org/content/25/9/1622.abstract N2 - Summary: Persistent proatlantal artery type 1 is one of the four anastomotic vessels between the carotid and vertebrobasilar arterial systems. Persistence of this embryonic anastomosis is extremely rare. We present such a case with bilateral persistent proatlantal arteries that arose from internal carotid arteries, entered the skull via the foramen magnum and united with the horizontal portions of vertebral arteries. We also mention its embryology, potential clinical implications, and differentiating features between two types of proatlantal arteries. ER -