. A text-book of human physiology . a muscle already stretched Ijy a cer-tain weight is unloaded, it shortens rap-idly at first, then more and more this case it is said to exhibit secondaryelasticity, or after shortening (Fig. 150). These secondary phenomena render theinvestigation of the elasticity in musclesand the influence of load rather order to reduce the effect of after exten-sion as much as possible, Marey and Blixhave hit upon a device by which the load can be increased or diminished contin-uously and verj rapidly, and the variations in length of
. A text-book of human physiology . a muscle already stretched Ijy a cer-tain weight is unloaded, it shortens rap-idly at first, then more and more this case it is said to exhibit secondaryelasticity, or after shortening (Fig. 150). These secondary phenomena render theinvestigation of the elasticity in musclesand the influence of load rather order to reduce the effect of after exten-sion as much as possible, Marey and Blixhave hit upon a device by which the load can be increased or diminished contin-uously and verj rapidly, and the variations in length of the muscle can berecorded at the same time (Fig. 151). The support (i) bears the muscle lever (c) on which the muscle is fastenedat m. The lever is loaded by means of the weight h, and is counterbalanced bythe weight k. The plate (f) with the recording surface (J) attached to it canbe moved back and forth between the two ledges screwed fast to the base. Atthe same time the weight h controlled by the bar h is moved along the Fig. 150.—Curves the ex-tension, .4, and elastic shortening,B, of two adductor muscles, afterBlix. ,4 was suddenly loaded with100 g. of weight and B was sud-denly relieved of its weight.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectphysiology, bookyear1
