Length constant - Wikipedia
In neurobiology, the length constant (λ) is a mathematical constant used to quantify the distance that a graded electric potential will travel along a neurite via passive electrical conduction. The greater the value of the length constant, the further the potential will travel.
Propagation of the Action Potential (Section 1 ... - Texas Medical …
Just as there is an index for how a change in potential changes with the time (the time constant), there is also an index denoted by the symbol λ (called the space constant or the length constant) which is an indication of how far a potential will spread along an axon in response to a subthreshold stimulus at another point. In Figure 3.3, the ...
The Frequency-Dependent Neuronal Length Constant in …
2016年8月9日 · The length constant describes the rate of exponential decay of membrane voltage as a function of distance from the location where current is injected (typically, a synapse or site of transmembrane ion flow during an action potential).
Nernst potential; conduction velocity - Brown University
Cable Theory for nerve axon length and time constants, and conduction velocity: The following assumes passive conduction of voltage changes down an axon or dendrite. Consider a cylindrical tube as a model for a dendrite or axon process.
Cable theory - Wikipedia
The length constant, (lambda), is a parameter that indicates how far a stationary current will influence the voltage along the cable. The larger the value of λ {\displaystyle \lambda } , the farther the charge will flow.
Cellular Neurophysiology - Stony Brook University
The length constant is the distance over which the steady-state membrane potential drops to 37% of the original amplitude. The conduction properties of the cable are best when \(r_{a}\ \) is relatively small and \(r_{m}\) is relatively large.
Cable Properties and Action potentials - University of British …
The length constant is the distance over which the magnitude of the depolarization falls to a value of 1/e (e = 2.718) of the initial depolarization. The length constant for a small neuron with a large number of resting K+ channels (black curve) can be as small as 0.1 mm; in this example it …
Ch. 3: Propagation of Action Potentials | McGovern Medical School
Just as there is an index for how a change in potential changes with the time (the time constant), there is also an index denoted by the symbol λ (called the space constant or the length constant) which is an indication of how far a potential will spread along an axon in response to a subthreshold stimulus at another point. In Figure 3.3, the ...
Three Mechanisms or Strategies for Increasing Conduction
Length constant (λ) of the axon is a measure of the distance over which a localized graded potential of an axon decreases to 1/e of its original size in response to a stepwise
The electrotonic length constant: A theoretical estimate for ...
2011年4月1日 · The electrotonic length constant of a neurite is theoretically estimated taking into account the extremely constricted extracellular space and the high spectral frequencies of electrical pulses used during neuroprosthetic stimulation of neurons.