According to some neuros there is little difference - docs in the UK use the terms pnhe more often - you hardly ever hear it in the US. Neuromyotonia is used here in the US by some when a person feels weakened by their fascics or cramps but not in a general sense. As in, my muscles been cramping all day it's tired! Not as in permanent weakness. Look at this page - maybe it will answer some questions Or better yet - ask your neuro to clarify his use of the terms so you are on the same page.