 Glycerol rhizotomy (surgical injection of glycerol into a nerve) has been studied 
although the beneficial effects and risks in MS patients of the procedures that relieve pressure on the nerve are still under discussion.Lhermitte's sign is an electrical sensation that runs down the back and into the limbs and is produced by bending the neck forward.The sign suggests a lesion of the dorsal columns of the cervical cord or of the caudal medulla, correlating significantly with cervical MRI abnormalities.