Variation of the Lateral Sacral Artery in relation to Sciatic Neuropathy

Figure 2

The inferior branch of the lateral sacral artery passing over the sacral convexity supplying the ventral surface of piriformis and the sacral roots of the sciatic nerve by several tiny branches (IIA: internal iliac artery; AT: anterior trunk; PT: posterior trunk; UMA: umbilical artery; SVA: superior vesical artery; IPA: internal pudendal artery; LSA: lateral sacral artery; OA: obturator artery; GPT: gluteopudendal trunk; SGA: superior gluteal artery; UTA: uterine artery; MS: middle sacral artery).