nerve plexus

A nerve plexus is a network of interlacing nerves or blood vessels. In the nervous system, plexuses are formed by the branching and rejoining of spinal nerves. These networks are crucial for distributing nerve fibers to various parts of the body.12

Major nerve plexuses include:
* Cervical plexus: Formed by spinal nerves C₁–C₄, it serves the neck, shoulders, and diaphragm.2
* Brachial plexus: Originating from C₅–T₁, it supplies nerves to the shoulder and upper extremity.3
* Lumbar plexus: Formed by spinal nerves L₁–L₄, it serves the lower abdomen, groin, and legs.4
* Sacral plexus: Works with the lumbar plexus to innervate the gluteal region and lower extremities.4
* Coccygeal plexus: Formed by spinal nerves S₄–Coc₁, it innervates the skin over the tailbone and around the anus.5

These plexuses ensure that motor and sensory information is efficiently relayed between the central nervous system and the body.2