Abstract
The term chorea is applied to a number of disorders attended with involuntary movements, and which probably differ considerably among themselves. It would be better, therefore, if it were possible, to reserve the name chorea for that acute, self-limited disorder first systematically described by Sydenham, occurring particularly in early life, attended especially with jerky incoordinate movement, and, so far as known, unassociated with demonstrable organic lesion. Thus, the so-called chronic or hereditary chorea described by Huntington has no relation with acute chorea except in the involuntary movement. The chronic disorder further has been found to be dependent on chronic meningo-encephalitic changes, with atrophy of the cerebral convolutions. It is also, in contradistinction from acute chorea, attended with mental alterations, which are generally described to be of the nature of dementia. With this view Kattwinkel<sup>1</sup>takes issue, basing his contention on the conditions found in three cases carefully studied from
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