Fig. 2From: Regional analgesia using ultrasound-guided intermediate cervical plexus block versus cervical erector spinae block for anterior cervical spine surgery: a randomized trialA Site of ultrasound probe insertion. B Sono-anatomy of cervical erector spinae block (TM = Trapezius muscle, LSM = Levator scapula muscle, ESM = erector spinae muscle and TP = transverse process). C Local anesthetic injectionBack to article page