The clinical picture of myasthenia gravis is distinctive. The typical case has muscular weakness of a particular distribution, affecting the external ocular muscles, and those of speech and swallowing, that is, the voluntary muscles innervated by the cranial nerves, the nuclei of which are located in the midbrain, pons, and medulla oblongata. Whilst the limb and trunk muscles may be weak, those of digestion and micturition are spared, as is the heart. Weakness follows exertion and improves with rest. There are other features of myasthenia gravis, the clinical spectrum of which is diverse, but the striking presentation of a typical case is bulbar paresis related to activity. Such a distinctive clinical syndrome awaited recognition by a discerning physician; one who carefully enquired into the clinical history of patients and expertly observed their clinical signs. Such a physician appeared in 17th century Oxford. His name was Thomas Willis (Fig. 1) [1] and [2].