The lumbar plexus is fashioned lateral to the intervertebral foramina by the ventral rami of the initial 4 lumbar spinal nerves (L1-L4), which all pass through psoas major. The more substantial branches in the plexus exit the muscle mass to pass sharply downward to get to the abdominal wall along https://www.sgvascularctr.com/swelling-leg-treatment-singapore/