Lumbar Plexus

Back & Neck Nerve Plexus Pain

Lumbar Plexus

Lumbar plexus can be described as a nervous plexus that is located in the lumbar area of the body that forms a part of the lumbosacral plexus. It is formed by divisions of L1-L4 (1st 4 lumbar nerves) as well as contribution of the last thoracic nerve specifically the T12 (subcostal nerve). In addition to this, communicating branches are passed by the 4th lumbar nerve together with the lumbosacral trunk to the sacral plexus. The nerves of this plexus normally support the anterior part of the thigh and passes right in front of the hip joint.

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Lumbar Plexus Location

The lumbar plexus passes via the psoas major and is also formed lateral to the intervertebral foramina. Its smaller motor branches are normally directly distributed to the psoas major and the larger branches usually exit the muscle at different sites running obliquely downwards via the pelvic region and exists the pelvis under inguinal ligament. This is in exception of obturator nerve leaves the pelvis via the obturator foramen. It also features a number of branches like the iliohypogastric nerve that normally runs on its proximal lateral border to the psoas nerve to run obliquely and laterally to the quadratus lumborum on the anterior sides.

On the lateral side of this muscle, the lumbar plexus normally pierces the tranversus abdominis running above the iliac crest between the abdominal internal oblique and the muscle. It gives off a number of motor branches to the muscles as well as sensory branch to the skin that is located on the lateral hip. The terminal branch also runs parallel to inguinal ligament so as to leave the aponeurosis that is located in the abdominal external oblique. This is located right above the external inguinal ring supplying the skin that is found above the hypogastric area together with the anterior cutaneous branch.

Lumbar Plexus Injury

Lumbar plexus injury normally shows various symptoms such as pain, sensation changes, varying degree of lower extremity weakness and diminished reflexes. Most of these are as a result of violent injuries such as trauma, pedestrian- automobile accidents, falls from high places and high speed car accidents. They are also associated with damage to blood vessels, internal organs and bony structures like pelvic ring. For this reason, it is highly recommended that a CT scan be done so as to evaluate bony injuries. EMG/NCS and MRI are also vital tools that can also be used for diagnosis to get to the bottom of the injury so that the right treatment method can be chosen without any complications.

More Info On The Lumbar Plexus

Visit this link for more detailed information and pictures of what and where the Lumbar Plexus is. I had the article written for me and it is way over my head as far as the medical terms used. Hopefully the link above will help. Go back to the home page of this site at Nerve Health Support.