Eight lectures on the signs of life from their electrical aspect eightlecturesons00wall Year: 1903 Response. ELectric&L Response, FIG. 2.—Simultaneous records of a series of muscular contractions, and of the corresponding series of negative variations. The method and apparatus for obtaining such records is described in the Appendix, p. 160, Fig. 63. wires and unpolarisable electrodes, indicates to you, by the excursion of the reflected spot of light, the extent or voltage of the accompanying electrical movements. The muscle is excited indirectly, by excitation of its nerve, an
Eight lectures on the signs of life from their electrical aspect eightlecturesons00wall Year: 1903 Response. ELectric&L Response, FIG. 2.—Simultaneous records of a series of muscular contractions, and of the corresponding series of negative variations. The method and apparatus for obtaining such records is described in the Appendix, p. 160, Fig. 63. wires and unpolarisable electrodes, indicates to you, by the excursion of the reflected spot of light, the extent or voltage of the accompanying electrical movements. The muscle is excited indirectly, by excitation of its nerve, and, as you see, the two sets of movements, mechanical and electrical, run an approxi- mately parallel course—both are large together or small to- gether, and if one is absent, so is the other. You would notice, however, on closer comparison, that the parallelism is not perfect, the mechanical and electrical responses are not an exact replica of each other, and the defect of correspondence is particularly apparent in simultaneous records of the two sets of responses. I cannot at present enter further upon this difference, I think it requires further study; if you ask which of the two records is the more faithful indicator of the chemical changes of which
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