Spastic pseudoparalysis: Better known as Creutzfeldt-Jakob disease (CJD). A dementing disease of the brain.
CJD is believed to be due to a highly unconventional transmissible agent named a prion. It is not a bacteria, not a virus, in fact not like any other known type of infectious agent.
CJD is classified as a spongiform encephalopathy. Most cases occur randomly (sporadically), but inherited forms exist.
There is neither cure nor treatment available for CJD. Other names for CJD include Creutzfeldt-Jakob syndrome and Jakob-Creutzfeldt disease.