Fig. 2From: Efficacy of bi-level erector spinae plane block versus bi-level thoracic paravertebral block for postoperative analgesia in modified radical mastectomy: a prospective randomized comparative studyErector spinae muscle before (A) local anesthetic administration and after (B) local anesthetic administration. TP: Transverse process; ESM: Erector Spinae MuscleBack to article page