I did not have the ND, but have the cramping on the left side of my neck and in the back of my head and down the back of my neck. Sometimes I think I will scream! That plus the L'Hermittes sign, the shocking sensations in my hands and legs, is about too much. And when I exercise or stretch my neck, the shocks get worse and go further down my legs. It makes it interesting trying to start an IV on a patient and not bend my head forward so I won't get shocked! Oh that gift that keeps on giving!!