accompanying artery of ischiadic nerve accompanying artery of ischiadic nerve the accompanying artery of ischiadic nerve is a long, slender artery in the thigh. it branches of the inferior gluteal artery. it accompanies the sciatic nerve for a short distance. it then penetrates it, and runs in its substance to the lower part of the thigh. accompanying artery of ischiadic nervethe arteries of the gluteal and posterior femoral regions (comitans nervi ischiadici labeled near center)detailssourceinferior gluteal arteryidentifierslatinarteria comitans nervi ischiadicifma77444anatomical terminology