Two groups of cases each on a separate reel, altogether about 2,000 feet of film, are shown. The first group includes cases showing deformities of motion and representing types of cases with recognized syndromes, that is to say, nosologic entities. After pointing out the varieties of motility defect, I will show the second reel illustrating unusual types of postencephalitic deformities of motion. In all of the cases studied, there are adventitious elements of motion resulting in definite deformities of movement.
A comparative study of these two groups of cases shows that the elements of motor deformity in each are analogous and in some instances identical. Though the histopathology doubtless differs, the localization of lesions must be the same. Indeed it suggests a definite relationship perhaps even between the underlying pathologic etiology.
In the two series of cases we see the motility disorders affecting the static, the kinetic, the synergistic mechanisms