![]() 130.Įr U, Fraser K, Lanzino G (2008) The anterior spinal artery origin: a microanatomical study. Yasargil MG (1984) Microneurosurgery, vol. In: Lasjaunias P, Berenstein A (eds) Surgical neuroangiography. Lasjaunias P, Berenstein A (1987) Functional vascular anatomy of the brain, spinal cord and the spine. Am J Neuroradiol 24:13–7.ĭoppman JL (1983) Spinal angiography. (2003) Anterior spinal artery and artery of Adamkiewicz detected by multi-detector row CT. (2001) Prevention of spinal cord ischemia during descending thoracic and thoracoabdominal aortic surgery. Shao-hong Z, Logan L, Schraedley P, Rubin GD (2009) Assessment of the anterior spinal artery and the artery of Adamkiewicz using multi-detector CT angiography. This process is experimental and the keywords may be updated as the learning algorithm improves. These keywords were added by machine and not by the authors. The ASA itself in its premedullary cervical portion gives rise to a mean of 2.5 perforating branches (7). The right and left rami give origin to a mean of 3.6 perforating branches before forming the ASA. On the basis of this proportion, the flow in the ASA is approximately 1/1000 of the flow in the VA according to the Poiseuille’s equation (8). ![]() The proportion of the mean diameter of the ASA rami to the VA is 0.17 (7). The outer diameter of the ASA rami ranged from 0.34 to 1.02 mm (mean 0.59 mm). The distance between the origin of the ASA and the origin of PICA is 9.02 mm on average. ![]() The distance between the point of origin of the ASA and the apex of the vertebrobasilar junction shows great variability ranging from 2.86 to 12.38 mm with an average of 6.86 mm (7). The rami of the ASA originated from the medial, lateral or posteromedial surface of the V4 portion of the VA distal to the posterior inferior cerebellar artery (PICA) origin. The two rami join with its opposite mate at the pyramidal decussation to run a recurrent course in the premedullary cistern to the cervical spinal cord (Fig. At its most cranial end the ASA usually originates from the junction of left and right rami emanating from both vertebral arteries (VAs). The ASA is a continuous channel throughout the entire length of the spinal cord (3–5), being constituted by the coalescence of ascending and descending branches of neighboring radicular arteries. The anterior spinal artery (ASA) or arteria spinalis anterior provides blood supply to the anterior 2/3 of the spinal cord and 75% of blood supply of the spinal cord comes from the ASA (1–3). ![]()
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