期刊文献

Impulse conduction in the jellyfish Aglantha digitale 收藏

水母aglantha digitale中的冲动传导

原文求助发布源

作者

Robert W. Meech[1]

作者单位

[1]Department of Physiology, University Walk, Bristol, UK

关键词

T-type Ca²⁺ channel;TTX-insensitive Na⁺ channel;voltage-clamp;macropatch;K⁺ channel clusters;jellyfish swimming;

关键词译文

T型Ca ^{2 + 通道; TTx不敏感Na ^{+ 通道;电压夹; macropatch; k ^{+ 通道群;水母游泳;}}}

发布日期

November 2004

页码

81-89

DOI

10.1007/s10750-004-2670-8

来源信息

Hydrobiologia ISSN：0018-8158, 2004年, 530卷, 1-3期, 81-89页

摘要

In the jellyfish Aglantha digitale two forms of swimming arise from two separate propagating axonal impulses: a fast, overshooting action potential that depends on TTX-resistant Na⁺channels, and a low-amplitude spike that depends on T-type Ca²⁺ channels. While the Na⁺action potential is propagated simply and without distortion, the shape of the Ca²⁺ spike depends on the past history of the axon; it is processed as well as propagated. Patch- and voltage-clamp experiments show how three classes of K⁺ channels contribute to this apparently unique system. A dual Na⁺/Ca²⁺ impulse mechanism may increase the bandwidth of an axonal line of communication but it also places restrictions on the form of the synaptic input needed for spike initiation.

摘要译文

在水母aglantha digitale中，两种游泳是从两个单独的传播轴突脉冲产生的：快速，过冲的动作电位，取决于ttx抗性Na ^{+ 通道，以及依赖于t的低幅度尖峰-type ca ^{2 + 通道。虽然Na ^{+ 动作电位简单地传播，但没有失真，但是Ca ^{2 + 尖峰的形状取决于轴突的过去历史;它被处理并传播。贴片和电压 - 钳位实验表明，三类K ^{+ 通道有助于这种明显独特的系统。双Na ^{+ / ca ^{2 + 脉冲机制可以增加轴突通信线的带宽，但它也会限制尖峰启动所需的突触输入的形式。}}}}}}}

Robert W. Meech[1]. Impulse conduction in the jellyfish Aglantha digitale[J]. Hydrobiologia, 2004,530(1-3): 81-89