The site of action potential initiation in cerebellar Purkinje neurons. Nature Neurosci. 8, 137–139 (2005). CAS PubMed Google Scholar Martina, M. & Jonas, P. Functional differences in Na+ channel gating between fast-spiking interneurones and principal neurones of rat hippocampus. J. Physiol...
An Action Potential in a Neuron
原文献:The action potential in mammalian central neurons 受到研究技术所限,对神经元细胞动作电位的仔细分辨是难以实现的(在保证记录通量的同时),因而,现有的很多认知神经科学研究都忽视了对于神经细胞动作电位的精细研究,而将神经细胞的放电视作是简单的“全或无”事件。就如同Hodgkin-Huxley在章鱼(或者乌贼,记不清...
1、动作电位(Action potential) 在生理学研究中,动作电位是指可兴奋细胞受到刺激时在静息电位的基础上产生的一次膜两侧电位的快速而可逆转的倒转和复原的过程。动作电位由峰电位和后电位组成,分别对应去极化(Depolarisation)和超极化(Hyperpolarization)过程。 可发生动作电位的细胞都可统称为可兴奋型细胞,这类细胞种类...
action potential, the brief (about one-thousandth of a second) reversal of electric polarization of the membrane of a nerve cell (neuron) or muscle cell. In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the contraction required for all movement...
Action potential, the brief (about one-thousandth of a second) reversal of electric polarization of the membrane of a nerve cell (neuron) or muscle cell. In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the
Action potential refers to the transient fluctuations in a neuron's membrane potential, which allow for the transmission of electrochemical signals between neurons without attenuation. It consists of three phases: the rapid depolarization (rising phase), repolarization (falling phase), and hyperpolarization...
Because the axon in many neuron types appears to be the site of lowest threshold for action potential initiation, the channel constellation in the axon is of particular interest. However, the axon is more experimentally inaccessible than the soma or dendrites. Recent studies have developed and ...
A. A large amount of Na+ outflow makes a positive potential outside the membrane and a negative potential inside the membrane B. The concentration of Na+ in the cell is higher than that outside of the cell C. When the cells are stimulated and excited, Na+ channels open to cause Na+...
This behaviour is also seen in Aplysia giant neurones and, together with the quantitative effects of varying external ion concentrations, suggests that both sodium and calcium act as carriers of current during the normal action potential.doi:10.1038/215546a0JUNGE...