EEO3,
There are 2 main systyems.... the Central nervous system, and the Peripheral nervous system. The Peripheral system is anything outside of the central system.
Neuropathies (damaged nerve cells- either large or small) occur within the peripheral system, more frequently. (I think because there are more nerve cells there).
PN encompasses any nerve cell damage, anywhere in the body (hands, arms, legs, feet, stomach, heart, etc) that is not in the central (spinal column and brain) system.