Fig. 1From: Anterior Quadratus Lumborum block area comparison in the three different volumes of Ropivacaine: a double-blind, randomized controlled trial in healthy volunteersPhotographs and ultrasonographic images demonstrate the lateral decubitus position for the QLB. A Depiction of needle position and probe placement in each group; B corresponding ultrasonographic images. Arrow indicates the needle trajectory orientation. ESM: erector spine muscle; TP: transverse process; PM: psoas muscle; QLM: quadratus lumborumBack to article page