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2. How shall the term taboparesis be used? Some use the term, as we feel erroneously, for instances of general paresis which happen to show crural areflexia (absence of knee-jerks). We feel that the best usage of the term is for instances in which well-defined symptoms of tabes (as well as of paresis) are present, namely, characteristic ataxia, lightning pains, and the like. If the term is used more loosely, as above mentioned, then practically every case of general paresis might perhaps be termed taboparesis, since almost every case of paresis does show involvement of the cord as well as of the cerebrum. Such involvement may lead to hyperreflexia, hyporeflexia, or areflexia according to the localization of the process. In true taboparesis, in which there is a commingling of the features of tabes with those of paresis, we should find the posterior roots of the spinal cord affected. The spinal lesions of paresis itself are more apt to be intraspinal; that is, confined to the nervous system within the pial investment.