Journal ArticleDOI
The spatial variation of plasmalemma potential in a spherical cell polarized by a small current source
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The problem of a current source of finite extent is solved approximately for the case where the source is located on the plasmalemma itself, and it is shown that dendrites and plasmodesmata give rise to no physiologically significant angular variations in plas malemma potential.Abstract:
It is well known that a considerable angular variation in the plasmalemma potential can be caused by a point source of current located within a cell, but no computationally convenient expression for this variation has been found, except for the case when the point source is located on the plasmalemma itself: such an expression is derived here. In addition, the problem of a current source of finite extent is solved approximately for the case where the source is located on the plasmalemma, and it is shown that dendrites and plasmodesmata give rise to no physiologically significant angular variations in plasmalemma potential.read more
Citations
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Journal ArticleDOI
An analysis of the cable properties of spinal motoneurones using a brief intracellular current pulse.
R. Iansek,S. J. Redman +1 more
TL;DR: A brief intracellular current pulse, with duration less than 500 μsec, has been applied to lumbosacral motoneurones in anaesthetized cats and the resulting voltage transients have been analysed by the procedure suggested in Jack & Redman (1971b) to obtain the cable parameters for each mot oneurone.
Book ChapterDOI
Electrical Properties of Plant Cells: Methods and Findings
G. P. Findlay,A. B. Hope +1 more
TL;DR: The starting point in any study of the electrophysiological properties of cells is the measurement of the electrical potential difference between two phases or between two points in one phase.
Journal ArticleDOI
Connections and barriers between cells of Drosera tentacles in relation to their electrophysiology.
TL;DR: The existence of the endodermoid partition is consistent with the observation that action potentials recorded extracellularly from the head may be positive-going while those recorded Extracellulary from the stalk are negative-going, and with the hypothesis previously proposed to explain why the amplitude of action possibles recorded from the mucilage varies as a function of the intensity of the receptor potential.
Journal ArticleDOI
Theoretical implications of the size principle of motoneurone recruitment.
TL;DR: A size principle does not automatically arise from cells receiving a constant density of afferent terminals, even if the afferents end preferentially on the motoneurone dendrites, and despite the fact that individual synapses generate larger EPSPs in smaller cells.
Journal ArticleDOI
Quantal Potential Fields around Individual Active Zones of Amphibian Motor-Nerve Terminals
TL;DR: It is concluded that quantal potential fields at the neuromuscular junction that can be measured with available recording techniques are restricted to regions within about 10 microm of the release site.
References
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Journal ArticleDOI
A quantitative description of membrane current and its application to conduction and excitation in nerve
A. L. Hodgkin,A. F. Huxley +1 more
TL;DR: This article concludes a series of papers concerned with the flow of electric current through the surface membrane of a giant nerve fibre by putting them into mathematical form and showing that they will account for conduction and excitation in quantitative terms.
Book
A treatise on the theory of Bessel functions
TL;DR: The tabulation of Bessel functions can be found in this paper, where the authors present a comprehensive survey of the Bessel coefficients before and after 1826, as well as their extensions.
Journal ArticleDOI
Branching dendritic trees and motoneuron membrane resistivity.
TL;DR: The numerical result is an estimated range of membrane resistivity values for mammalian motoneurons, and a corresponding set of values for the dendritic to soma conductance ratio, significantly greater than those currently accepted in the literature.