From time to time there have been cases under observation in the St. Peter State Hospital in which there was loss of capacity to coordinate muscular movements involved in prehension and locomotion. These cases could not be placed in any of the usual categories, because there was no evidence of organic disease in the general nervous system. In some of these cases the loss of control of muscular movement was so great that any voluntary action was impossible, while in others there was, apparently, complete palsy. We never have been able to determine the nature of the involvement of the central nervous system in these cases, because there has always been more or less complete recovery of functional capacity, and none of the cases has come to necropsy.
So long as these peculiar manifestations occurred in the ordinary course of brain degeneration, they were considered to be a part of