Abstract
THE electrical properties of the myelinated nerve fibre in potassium-rich solution were observed by Stämpni1, Mueller2 and Tasaki3. Those of the unmyelinated nerve fibre were observed by Segal4, Tasaki3 and Moore5. When the membrane potential is depolarized by potassium, the potential difference across the membrane produced by the inward current pulse is larger than that produced by the outward one and exhibits a kind of discontinuous increase at a certain current intensity (the current-potential relation is non-linear). The time-course of the potential difference produced by the inward current has two steps. This phenomenon is called “anodal threshold phenomenon” by Segal4 and “hyperpolarizing response” by Tasaki3. Tasaki reported that the hyperpolarizing response in the giant axon of the squid was slightly different from that in the myelinated nerve fibre.
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References
Stämpfli, R., Helv. Physiol. Acta, 16, 127 (1958).
Mueller, P., J. Gen. Physiol., 42, 163 (1958).
Tasaki, I., J. Physiol., 148, 306 (1959).
Segal, J. R., Nature, 182, 1370 (1958).
Moore, J. W., Nature, 183, 265 (1959).
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TOMITA, T., SAIMI, T. & TOIDA, N. Repetitive Hyperpolarizing Response of the Nerve Fibre of Crayfish. Nature 190, 271–272 (1961). https://doi.org/10.1038/190271a0
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DOI: https://doi.org/10.1038/190271a0
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