Lumbar Plexus

The lumbar plexus is a nervous plexus in the lumbar region of the body which forms part of the lumbosacral plexus. It is formed by the ventral divisions of the first four lumbar nerves (L1-L4) and from contributions of the subcostal nerve (T12), which is the last thoracic nerve. Additionally, the ventral rami of the fourth lumbar nerve pass communicating branches, the lumbosacral trunk, to the sacral plexus. The nerves of the lumbar plexus pass in front of the hip joint and mainly support the anterior part of the thigh.

The plexus is formed lateral to the intervertebral foramina and pass through psoas major. Its smaller motor branches are distributed directly to psoas major, while the larger branches leave the muscle at various sites to run obliquely downward through the pelvic area to leave the pelvis under the inguinal ligament, with the exception of the obturator nerve which exits the pelvis through the obturator foramen.

Read more about Lumbar PlexusBranches, Additional Images

Other articles related to "lumbar plexus, plexus, lumbar":

Lumbar Plexus - Additional Images
... sympathetic chain and its connections with the thoracic, abdominal, and pelvic plexuses Lumbar plexus after dissection Lumbar plexus after dissection ...
Human Leg - Anatomy - Neurovascular System - Nerves
... innervation to the lower limb is supplied by the lumbosacral plexus, which is formed by the ventral rami of the lumbar and sacral spinal nerves with additional contributions from ... Based on distribution and topography, the lumbosacral plexus is subdivided into the lumbar plexus (T12-L4) and the Sacral plexus (L5-S4) the latter is often further subdivided into the sciatic and ... The larger branches of the plexus exit the muscle to pass sharply downward to reach the abdominal wall and the thigh (under the inguinal ligament) with the ...
Obturator Nerve - Additional Images
... Sacral plexus of the right side Right hip bone ... Right side Plan of lumbar plexus The lumbar plexus and its branches Deep and superficial dissection of the lumbar plexus Dissection of side wall of pelvis ...
Nerve Plexus - Lumbar Plexus
... Since the Lumbar plexus and Sacral plexus are interconnected, they are sometimes referred to as the Lumbosacral plexus ... only ones that do not originate from a plexus ... The ventral rami of L1-L5 spinal nerves with a contribution of T12 form Lumbar plexus ...