. Electro-physiology. Electrophysiology. 116 ELECTRO-PHYSIOLOGY CHAP. second. The shortening of the apex-time is much more obvious in incomplete tetanus, when the period of rising energy often appears to be reduced to the third or fourth part of the time which it takes in single twitches. Moreover, we learn from the relations of height in a contrac- tion which is the sum of two simple twitches, that the theory, by which the later of the two is regarded as a single contraction upon a different abscissa, is not legitimate. Kronecker and Hall. b FIG. 48.—«, Series of ascending; fr, series of desc
. Electro-physiology. Electrophysiology. 116 ELECTRO-PHYSIOLOGY CHAP. second. The shortening of the apex-time is much more obvious in incomplete tetanus, when the period of rising energy often appears to be reduced to the third or fourth part of the time which it takes in single twitches. Moreover, we learn from the relations of height in a contrac- tion which is the sum of two simple twitches, that the theory, by which the later of the two is regarded as a single contraction upon a different abscissa, is not legitimate. Kronecker and Hall. b FIG. 48.—«, Series of ascending; fr, series of descending stimulated twitches. The place of the second stimulus is the same in both cases, and only the first varies. The apex-height of the stimulated twitches inclines towards the left. (v. Kries.) (3) found the height of "ascending" maximal contractions to be greater at first than would correspond with Helmholtz's law, but so much the smaller afterwards, according to the degree in which the second contraction superposed itself behind the earliest twitch. The greatest energy was developed by the second impulse when it fell in the first ^ of the primary curve of contraction. The curve does not then proceed as if the state of contraction of the muscle at this moment were its point of rest, the second twitch only being excited, but the impulse of the first twitch is still effective. In the second and third -jt- the second. 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 Biedermann, W. (Wilhelm), 1852-1929; Welby, Frances A. (Frances Alice). London : Macmillan
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