Interstate medical journal . otdiffer from a normal curve to any appreciable extent in the ascending curve, butdiffers very greatly, and shows the characteristics of the special disease in thedescending portion of curve. This can be proved on the authors apparatus, asthe construction is rigid and the possible avenues of error eliminated. In a study of several hundred knee-jerks, occurring in a large variety ofnervous diseases, I have never seen a knee-jerk curve, even in spastic cases, inwhich the ascent was slower than the descent, as in the von Bechterew curve. 548 BRADLEY. The machine is di
Interstate medical journal . otdiffer from a normal curve to any appreciable extent in the ascending curve, butdiffers very greatly, and shows the characteristics of the special disease in thedescending portion of curve. This can be proved on the authors apparatus, asthe construction is rigid and the possible avenues of error eliminated. In a study of several hundred knee-jerks, occurring in a large variety ofnervous diseases, I have never seen a knee-jerk curve, even in spastic cases, inwhich the ascent was slower than the descent, as in the von Bechterew curve. 548 BRADLEY. The machine is divided into two principal parts: (a) one to transmit theimpulse from leg to recorder, and (6) a recorder to write the chart. After testing numerous forms and modifications of an automatic striker, Ifind that for ordinary work a rather heavy metal rubber-tipped percussion ham-mer is best and most convenient. For special work, and where it is importantto make comparisons between the charts of knee-jerks at periods of time sepa-. rated by a considerable interval, in order to note any change, a spring hammermay be used, which is so constructed that the blow delivered may be regulatedfrom light to heavy, and can be reproduced under the same circumstances at any time. Attached to the leg at a measured distance, usually ten inches, from theinsertion of the quadriceps tendon, and running backward, is a flexible stee]. THE REFLEXO GRAPH AND ITS USES.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmedicine, bookyear190
