Miêu tảWriting by a Parkinson's disease patient.png	English: Writing by a patient with Parkinson's disease, showing abnormalities, which may include micrographia
Ngày	1879
Nguồn gốc	Lectures on the diseases of the nervous system. Published 1879. Second edition by H. C. Lea in Philadelphia. Lecture V: On paralysis agitans. (p. 112)
Tác giả	Jean-Martin Charcot
Giấy phép (Dùng lại tập tin)	Public domainPublic domainfalsefalse Tác phẩm này thuộc về phạm vi công cộng tại quốc gia gốc và các quốc gia và vùng lãnh thổ có thời hạn bản quyền là cuộc đời tác giả cộng thêm 100 trở xuống. Bạn cũng cần phải kèm theo một thẻ phạm vi công cộng tại Hoa Kỳ để ghi rõ tại sao tác phẩm này lại thuộc về phạm vi công cộng tại Hoa Kỳ. Tập tin này đã được đánh dấu là không bị hạn chế dưới luật bản quyền, kể cả tất cả những quyền liên quan và lần cận. https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Phiên bản khác	File:Writing by a Parkinson's disease patient.jpg

Text accompanying the image in the original source:

The tremor causes the handwriting to exhibit characters which are somewhat special. When the disease is commencing, the writing at first glance seems normal, but when examined with a magnifying glass inequalities are perceived, some parts being thicker and heavier than others. Later on, in the period of stationary intensity for instance, the changes are more marked and consequently plainer. The specimen, Fig. 7 (p. 112), represents the writing of a patient whose case we studied at the Hôpital St. Louis, in 1869. The strokes forming the letters are very irregular and sinuous, whilst the irregularities and sinuosities are of a very limited width (Bourneville).
On a careful examination of this specimen of writing it will be perceived that the down-strokes are all, with the exception of the first letter, made with comparative firmness and are, in fact, nearly normal — the finer up-strokes, on the contrary, are all tremulous in appearance, and it is to the unsteadiness of these lines that the peculiar character of the writing here is principally due. From this I would infer, that the flexors of the fingers were, at this stage of the disease, less affected by tremor than the extensors, and that, amongst the latter, the interossei were probably the earliest affected. This inference will not be without interest for those who remember the attention which Dr. Duchenne (de Boulogne) gave to the conduct of these muscles in the various paralytic and atrophic affections of the hand (Sigerson).

The handwritten text reads: "Catherine Metzger 13 Octobre 1869".