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Das Na-Transportsystem während der Erregungsprozesse am Ranvier-Knoten isolierter markhaltiger Nervenfasern

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Summary

(1) An attempt is made to interpret the action potential of medullated nerve fibres of the frog in terms of permeability changes to Na ions.

(2) In keeping with a suggestion byHodgkin andHuxley, the following assumptions are made: (a) a carrier system is responsible for transporting Na ions across the nodal membrane; (b) in a resting fibre (high membrane potential) its transport capacity is small; (c) depolarization has a dual effect on the transport system, namely activation of carrier groups as a quick reaction and inactivation of the whole system as a slower reaction.

(3) The following experimental observations are interpreted on the ground of these assumptions: threshold for depolarization, threshold for repolarization, absolute and relative refractory period, alteration of the action potential on application of a hypertonic (5%) NaCl solution.

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Author notes

  1. Hans-Christoph Lüttgau

    Present address: Department of Biophysics, University College, Gower Street, W.C.1, London

Authors and Affiliations

  1. Physiologisches Institut der Universität Bern (Hallerianum), Switzerland

    Hans-Christoph Lüttgau

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  1. Hans-Christoph Lüttgau
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Additional information

Eine vorläufige Mitteilung erfolgte auf der Tagung des Schweiz. Vereins für Physiologie usw. in Fribourg 1956. Helv. physiol. Acta14, C35–36 (1956).

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Lüttgau, HC. Das Na-Transportsystem während der Erregungsprozesse am Ranvier-Knoten isolierter markhaltiger Nervenfasern. Experientia 12, 482–486 (1956). https://doi.org/10.1007/BF02162535

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