. General physiology; an outline of the science of life. 424 GENERAL PHYSIOLOGY one another so rapidly that between them there is no time for the muscle to extend. In order to study the details of tetanic con- traction, a myograph is employed (Fig. 206), the_ writing-lever of which traces the movement of the muscle upon stimulation in^ the form of a curve upon a revolving drum. If the muscle be stimu- lated by means of a single, not too strong induction-shock, so that it performs only a moderate contraction, a single curve is obtained, the ascending limb of which represents the phase of contra
. General physiology; an outline of the science of life. 424 GENERAL PHYSIOLOGY one another so rapidly that between them there is no time for the muscle to extend. In order to study the details of tetanic con- traction, a myograph is employed (Fig. 206), the_ writing-lever of which traces the movement of the muscle upon stimulation in^ the form of a curve upon a revolving drum. If the muscle be stimu- lated by means of a single, not too strong induction-shock, so that it performs only a moderate contraction, a single curve is obtained, the ascending limb of which represents the phase of contraction, the descending limb the phase of expansion (Figs. 205, //, and 207, I). But, if several induction-shocks be allowed. Fig. 205.—/, Myograph. //, Curve of contraction. (After Helmlioltz.) ti, Moment of stimulation by an induction-shock. to act upon the muscle in succession and at regular intervals in such a manner that each succeeding stimulus reaches it at the moment when it is just beginning to extend, the first contractions are superposed, , the shortening of the muscle is continued with every succeeding contraction; the shortening of each contraction may be regarded as representing the resting point of the muscle, and from this the shortening of the next contraction rises. Thus, with every succeeding stimulus the curve of shortening rises like steps and reaches a certain height, ai which it is then maintained, still allowing the regular variations. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
Size: 1794px × 1393px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookauthorverwornmax18631921, bookcentury1800, bookdecade1890
