This page discusses the organization and functions of the peripheral nervous system (PNS), detailing the structure of nerves and their protective layers. It highlights the roles of cranial and spinal ...This page discusses the organization and functions of the peripheral nervous system (PNS), detailing the structure of nerves and their protective layers. It highlights the roles of cranial and spinal nerves in sensory and motor functions, the pathways of motor neuron axons, and the importance of dermatomes and myotomes in diagnosing neurological and motor control issues.