M. Mailhouse. A case of periodic familial paralysis. Some observations on an isolated case of family periodic paralysis. — Journal.of Nervous and Mental Diseases. 1910, № 4

The author gives the case history of a boy who, from the age of 13½, began to have periodic paralytic attacks; the intervals between them ranged from a few days to several months. The intensity of paralytic phenomena was not the same; at times they were limited to paresis of the lower extremities, sometimes they intensified to complete paralysis of the arms and legs. The patient's mother notes that some of the attacks were apparently caused by overwork; so, on the eve of one of them the boy rode a bicycle, another time he went to bed too late; finally, some attacks were preceded by a cold or gastrointestinal disturbances.