. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. tremble or vi- The arm was of several mus- led) by a writer > surface. Sucb ipeued; but the case can best be the thigh of a graphic record ig. 173), a series I with the result rate of iuterrup-. permost tracins Indl- M were given; lower, like othen, from left in rapidity, such ined; and if the the result is that :Fo«ter). THE STUDY OP MUSCLE PHYSIOLOGY. 180 It is possible to s
. A text-book of comparative physiology [microform] : for students and practitioners of comparative (veterinary) medicine. Physiology, Comparative; Veterinary physiology; Physiologie comparée; Physiologie vétérinaire. tremble or vi- The arm was of several mus- led) by a writer > surface. Sucb ipeued; but the case can best be the thigh of a graphic record ig. 173), a series I with the result rate of iuterrup-. permost tracins Indl- M were given; lower, like othen, from left in rapidity, such ined; and if the the result is that :Fo«ter). THE STUDY OP MUSCLE PHYSIOLOGY. 180 It is possible to see in those tracings a genetic relation, the second figure being evidently derivable from the flrat, and the third from the second, by the fusion of all the curves into one straight line. The Xmole Tone.—There are a number of experimental facts from which the conclusion has been drawn that tetanic contrac- tion i)> occomiKinied by a muscle tone which is in itself evidence of the nature of the contraction. We may safely conclude that, at all events, most of the mus- cular contractions occurring within the living body are tetanic —i. e., the muscle is in a condition of shortening, with only very brief and slight phases of relaxation; and that a comparatively small number of individual contractions sufflce for tetanus when caused by the action of the central nervous system; though, as proved by experiments on muscle removed from the hotly, they may be enormously increased. While a few stimu- lations per second suffice to cause tetanus, it will also persist though thoiisands be employed. TBB OHAMOB8 ZN A HUBOLB SURINO OONTRAOTION. Though the change in form is veiy great during the con- traction of a muscle, the change in bulk is almost inappreci- able, amounting to a diminution of not more than about itAn of the volume. In fact, according to the latest investigator, there is no diminution whatever. Since the fibers of striped muscle are of very limited length (30 to 40 m
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