Opalina に於ける纎毛波の研究(1)

概要

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1) Pattern and passage way of the metachronal wave in a parasitic ciliate, Opalina japonica, change according to the state of the animal (Fig. 1). 2) The conduction velocity of the wave and beating frequency of cilia at the original part of the wave are always larger than those of the distal part, although the values depend largely on the excitatory state which may be represented by the above-mentiond pattern. 3) Points on the cell surface are stimulated through microelectrode, and electric current required to cause the minimal cathodal effect are estimated on each of these points. 4) Comparison of the result with the topographical difference of conduction velocity or beating frequency on the cell surface seems to suggest that there is some correlation between the electrical threshold and the ciliary metachronism. 5) However, a remarkable difference normally existing between the pattern of "isothreshold lines" and that of the metachronal wave may probably indicate that the gradient of excitability on the cell surface is not directly responsible for the conduction of the ciliary wave.
社団法人日本動物学会の論文
1951-09-15