Presentation of CaseA twenty-one-year-old woman, a switchboard operator, entered the hospital complaining of severe headaches.Four or five years before admission, she noticed the onset of diplopia. At first this condition was corrected by prismatic glasses; but it grew progressively worse, requiring frequent change of lenses, and one year before admission the diplopia persisted in spite of glasses. Approximately concomitant with the onset of the diplopia, the patient began to have "cramps" in the right hand. These were accompanied by a cold, numb feeling sometimes limited to the fingers and sometimes involving the entire hand. During these attacks the . . .