THIS paper records the occurrence in a 33-year-old idiot of bilateral etat marbre of caudate nucleus, putamen, and thalamus, together with a small atrophic cerebellum, atrophied inferior olives, and sclerosis of the nuclei pontis and the transverse pontine fibres. This combination of lesions is surprising since etat marbre of the corpus striatum is in the large majority of cases a phenomenon of...