ELECTROPHYSIOLOGY OF THE SOMATIC MUSCLE CELLS OF ASCARIS LUMBRICOIDES.
ELECTROPHYSIOLOGY OF THE SOMATIC MUSCLE CELLS OF ASCARIS LUMBRICOIDES.
复制标题
蛔虫体肌细胞的电生理学。
DOI：
10.1002/jcp.1030620206
复制
发表时间：
1963
影响因子：
--
通讯作者：
V. Sanchez
中科院分区：
文献类型：
--
作者：
J. T. Debell;J. delCastillo;V. Sanchez
DeBellet等人用常规的微电极插入蛔虫的“原生质”球，记录了蛔虫体肌细胞的电活动。平均静息电位约为30 mV。这被打断了，每秒1.5到7次，缓慢的自发波，持续0.2秒，在每一个上叠加最大约10mV的尖峰（上升时间约22毫秒）。肌肉细胞的外部或内部刺激未能引起传播的电活动，但在该区域的神经索的电刺激引起类似的自发的肌肉电位。传导至肌细胞的距离约为6 cm。按照第通过微电极的肌细胞的超极化抑制了注射和周围肌细胞中的锋电位。结论是蛔虫的神经肌肉接头建立在神经索和合胞体之间，合胞体分支成肌细胞的纺锤体（收缩单位）。W.P.R.
DeBellet al. recorded the electrical activity of somatic muscle cells ofAscaris lumbricoidesvar.suumwith conventional micro-electrodes inserted into the "protoplasmic" bulbs of the cells. The mean resting potential was about 30 mV. This was interrupted, 1.5 to 7 times per sec., by slow spontaneous waves, lasting up to 0.2 sec., on each of which was superimposed a spike of maximum about 10 mV (rising time about 22 msec.). External or internal stimulation of the muscle cells failed to elicit propagated electrical activity but electrical stimulation in the region of the nerve cord gave rise to muscle potentials similar to the spontaneous ones. Conduction to the muscle cells was about 6 cm. per sec. Hyperpolarization of muscle cells by means of the micro-electrodes suppressed the spike potentials in the injected and surrounding muscle cells. It was concluded that the neuro-muscular junctions inAscarisare established between elements of the nerve cords and a syncytium which branches off into the spindles (the contractile units) of the muscle cells. W.P.R.