. Electro-physiology. Electrophysiology. IV ELECTROMOTIVE ACTION IN MUSCLE 347 Here, as in the regular muscle cylinder, the lines of intersection of the isoelectric planes with the surface of the column, form circles parallel with the periphery of the end-surfaces, the curves of current of meridional lines. Yet a perfectly definite seat of electromotive force cannot be forthwith determined, for an analogous distribution of surface potential may occur in many other cases, where it is at least doubtful whether electromotive forces are at work within the body at only one, or at several, or many p
. Electro-physiology. Electrophysiology. IV ELECTROMOTIVE ACTION IN MUSCLE 347 Here, as in the regular muscle cylinder, the lines of intersection of the isoelectric planes with the surface of the column, form circles parallel with the periphery of the end-surfaces, the curves of current of meridional lines. Yet a perfectly definite seat of electromotive force cannot be forthwith determined, for an analogous distribution of surface potential may occur in many other cases, where it is at least doubtful whether electromotive forces are at work within the body at only one, or at several, or many places. As a matter of fact, each new seat of electro- motive action implies a different system of lines of current and potential, a different distribution of surface-potential; but, as Helmholtz pointed out, seeing that in a complex of electro- motive forces the potential of each point on the surface of the. FIG. 109.—Schema of hypothetical distribution of electromotive planes in a muscle-fibre. Axial longitudinal section. (Hermann.) body corresponds with the sum of the potentials brought into play at this particular point by each electromotive force respectively, we may conceive many combinations in which the same distribu- tion of surface-potential would always present itself. Turning now to the case in which a cylindrical body exhibits a similar electromotive action to that which occurs at both ends of a muscle with parallel fibres, provided at either end with an artificial transverse section, we find (amongst others) that a solid copper cylinder with a zinc sheath corresponds with the required conditions when immersed in any conducting fluid, dilute H.,S04. This, according to schema A (Fig. 109), is traversed by innumerable lines of current, which pass as a whole from the electrically positive zinc sheath to the electrically nega- tive end-surfaces of the copper, exhibiting a distribution of surface-. Please note that these images are extracted from scanned pag
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