The effectiveness of PHT in a variety of neuromuscular disorders has been observed clinically and, in many cases, demonstrated by quantitative electrophysiology. Some of these disorders cause much suffering and are frequently disabling or incapacitating. Neuromuscular disorders for which PHT has been reported useful include continuous muscle fiber activity syndromes, such as Isaacs’ syndrome and myotonic dystrophy; Sydenham’s chorea; paroxysmal choreoathetosis; “restless legs”; muscle spasms; abnormal movements associated with Parkinsonism; intractable hiccups; palatal and respiratory myoclonus; and tetanus. In muscle, as in nerve, PHT corrects inappropriate electrical activity without interfering with normal function. PHT does not sedate, and does not compromise respiratory function.