File:Interstate medical journal (1903) (14595374830).jpg

Identifier: interstatemedica1019unse (find matches)
Title: Interstate medical journal
Year: 1903 (1900s)
Authors:
Subjects: Medicine
Publisher: St. Louis, : Interstate Medical Journal
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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titatively the extent of the knee-jerk, and write a comprehensive THE REFLEXOGRAPH AND ITS USES. 547 chart in the form of curves, somewhat similar to a fever chart, as will be seenin the accompanying illustrations. These demonstrate characteristics of thereflex in different diseases that can be shown in no other way. The apparatuscan also be used to record a variety of vital phenomena of interest to neurolo-gists, such as the Babinsky reflex, ankle clonus, tremors, exhaustion of reflex,and for numerous other purposes, some of which are here illustrated. Since constructing this machine I have discovered that it is not the firstmade for the purpose, as I had believed, but it is original, in that it was con-structed without any knowledge of a pre-existing apparatus of that kind, and isconstructed on different principles from its predecessor. W. von Bechterew reported a machine of his own in the Nearologisches Cen-tralblatt, November 2, 1892, which would write the curve of a knee-jerk and
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Fig. 1.—Von Bechterews curve, from a case of epilepsy (from Neurologisehes Centralblatt), .showing theslow ascent and rapid descent, due to the rubher drumhead on the Marey apparatus. Reads from right to left. show the latent period, but, as far as I know, would do nothing else. It wasdefective in construction and limited in its uses. The accompanying illustration (Fig. 1) shows one of the curves made byVon Bechterews apparatus Paradoxical as it seems, the strong point in hisapparatus is also the weak point, i. e., the rubber-covered drum which is used(the Marey compression apparatus) makes it very sensitive to any impulse, butthe resiliency of the rubber so modifies the curve that it is not a true record ofthe reflex. (1) It imposes a resistance to pressure, which makes a gradualcurve on the up-stroke; and (2) when the pressure of the short arm is taken offthe rubber by the foot falling back to its first position, there is added the resil-iency of the rubber (which had been displac

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