ザリガニの單一筋纎維の電氣刺激
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概要
- 論文の詳細を見る
1) Single muscle fibre from the claw adductor of crayfish was stimulated through multipolar electrodes (Fig. 1), by means of which it was possible to give stimuli of various numbers, time intervals at desired sequence. 2) If stimulated directly, muscle fibre came to action by a single electrical shock, contrary to the results obtained by many authors with indirect stimulation. 3) No particular point was detected with regard to excitability along the whole surface of the fibre, suggesting that stimulation was direct. 4) Repetitive stimulation with supermaximal intensity gave rise to summated contraction. Repetition number, its frequency and the loci of electrode were changed, and their effect on the contraction curve was examined as is shown in Figs. 2, 3 and 4. It was concluded that contraction thus induced might never be propagated as in the case of vertebrate striated muscle. 5) Successive subliminal stimuli were found effective provided that the stimulation intensity was not less than 70〜75% of threshold (Fig. 5). 6) No special contractile elements, e. g., fast or slow, were proved to exist within a muscle fibre. 7) A single crustacean muscle fibre, if stimulated directly, may exhibit contractions with various velocities, including those shown in the case of indirect stimulation.
- 社団法人日本動物学会の論文
- 1951-07-15