NERVE PLEXUS ANATOMYThe nerve plexus is actually made up of a multitude of nerve branches. These branches come from the spinal nerves, except for the thoracic spinal nerves 2 through 12. The remaining nerves donate their anterior rami, which branch off from the spinal nerves only to adjoin with each other.
NERVE PLEXUS STRUCTUREOnce they connect, they break off again and develop the network of nerve fibers known as the nerve plexus. There are actually 4 of these nerve plexuses in the human body, the brachial plexus, cervical plexus, the sacral plexus and the lumbar plexus.
The nerves which come out of the various plexus are typically named either for the specific area which they innervate or the basic course which can be traced along the way.
NERVE PLEXUS DIAGRAM
Image: Nerve Plexuses