Fig. 1
From: Is lumbar erector spinae plane block (L-ESPB) a lumbar plexus block?: a case report of three cases
A Sonoanatomy of the first case, showing the transverse process of L4 vertebra. B Local anesthetic spread (star marks). C X-ray of the first case showing the contrast spread towards lumbar plexus. D Local anaesthetic spread in case 2. E Contrast spread towards lumbar plexus in case 2. F CT of case 3 spread of contrast close to paravertebral spaces. TP—transverse process, ESM—erector spinae muscle