The lumbar plexus is shaped lateral towards the intervertebral foramina via the ventral rami of the very first 4 lumbar spinal nerves (L1-L4), which all go through psoas main. The more substantial branches on the plexus exit the muscle to go sharply downward to reach the abdominal wall and also https://www.sgvascularctr.com/swelling-leg-treatment-singapore/