The lumbar plexus is shaped lateral to your intervertebral foramina because of the ventral rami of the first 4 lumbar spinal nerves (L1-L4), which all pass through psoas major. The larger branches of the plexus exit the muscle mass to move sharply downward to reach the abdominal wall and the https://www.sgvascularctr.com/swelling-leg-treatment-singapore/