Plexus lumbalis

Plexus Lumbalis is a network of intersecting nerves located in the lumbar region of the body. It is formed by the anterior divisions of the lumbar nerves, the first lumbar nerve, and often by a branch from the twelfth thoracic.

Anatomy

The Plexus Lumbalis is formed by the anterior rami (divisions) of the lumbar spinal nerves L1-L4 and often includes contributions from T12. The plexus is located in the psoas major muscle, which is situated on the posterior abdominal wall.

The nerves of the lumbar plexus pass in front of the hip joint and mainly support the anterior part of the thigh. They are responsible for the sensory perception of the skin of the thigh, the muscles of the anterior part of the thigh, and parts of the lower leg and foot.

Branches

The branches of the lumbar plexus include the iliohypogastric nerve, ilioinguinal nerve, genitofemoral nerve, lateral femoral cutaneous nerve, obturator nerve, and femoral nerve. Each of these nerves has a specific function and innervation area.

Clinical Significance

Damage to the lumbar plexus can result in a variety of medical conditions, including lumbar plexopathy and lumbar disc herniation. Symptoms of lumbar plexus injury can include pain, numbness, or weakness in the areas of the body innervated by the nerves of the plexus.

See Also

• Nervous System
• Spinal Nerves
• Lumbar Plexopathy
• Lumbar Disc Herniation