The peripheral nervous system (PNS) is the body's information superhighway, transmitting signals across our bodies much like fiber optic cables. Nerves are everywhere within us, permeating our tissues, enmeshing our cells in a web of neurites, and connecting distant parts of the body to each other. Without the PNS, our internal communications would break down.
Despite many advances in neuroscience, the intense focus on the biology of the brain has left the PNS by the wayside. Although we now have a deeper grasp of neural biochemistry, molecular biology, and electrophysiology, the PNS is still seen as a passive transmission pipeline for information heading to and from the brain.