. Electro-physiology . N f Fig. 9. conveying the current to the nerve are represented by A, the positive, and B, the negative pole. The relative extent of the alterations of the excitability, as revealed by the energy of the muscular contraction fol- lowing the application of a uniform stimulus, is shown by the three curves, the size and extent of which represent the changes produced by a weak, medium, and strong current. The curve also shows that with a weak current (a, 6, c) the excitability in the anodal zone is decreased and in the cathodal zone increased, and that the neutral point, 6, li
. Electro-physiology . N f Fig. 9. conveying the current to the nerve are represented by A, the positive, and B, the negative pole. The relative extent of the alterations of the excitability, as revealed by the energy of the muscular contraction fol- lowing the application of a uniform stimulus, is shown by the three curves, the size and extent of which represent the changes produced by a weak, medium, and strong current. The curve also shows that with a weak current (a, 6, c) the excitability in the anodal zone is decreased and in the cathodal zone increased, and that the neutral point, 6, lies close to the side of the positive pole. From this point the changes in the excitability gradually increase, and reach their maximum in the neighborhood of the electrodes, from which both phases graduallj' decline. The position of the neutral point also indicates that hy far the larger portion of the intra-polar region is in the condition of increased excitability, or catelectrotonus. The curve d, e,y, similar in its general form to the preceding, represents the alter- ations in the excitability produced by a current of medium strength; pari passu with the increase in current-strength, there is an increase in
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectelectro, bookyear1894
