The lumbar plexus is a nerve plexus (a community of intersecting nerves) within the physique’s lumbar area. It’s fashioned by the ventral branches of the primary to the fourth higher lumbar nerves (L1-L4), with the final thoracic nerve (or T12) normally supplementing the primary lumbar stage by a small department.
The loops of communication between the primary three lumbar ranges and the larger portion of the fourth lumbar nerve kind the lumbar plexus. The primary lumbar nerve, or L1, divides into an higher and decrease department. The higher and larger department splits into the ilioingual and iliohypogastric nerves. The decrease department unites with the second lumbar nerve (L2), which – together with L3 and L4 – splits into ventral and dorsal divisions.
The lumbar plexus is embedded within the muscle psoas main, passing in entrance of the hip joint. It really works with the sacral plexus to offer autonomic, motor, and sensory fibers to the decrease extremities and to the physique’s gluteal and inguinal (groin) areas.