Firing Rate
Firing Rate - Related Videos
12:47
Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates
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Cited by 8 •
2014
Here we describe an adaptation of protocols used to induce homeostatic plasticity in neurons for the study of plasticity of astrocytic G protein-coupled receptors. Recently used to examine changes in astrocytic group I mGluRs in juvenile mice, the method can be applied to measure scaling of various astrocytic GPCRs, in tissue from adult mice in situ and in vivo, and to gain a better appreciation of the sensitivity of astrocytic receptors to changes in neuronal activity.
09:20
Microelectrode Array Recording of Sinoatrial Node Firing Rate to Identify Intrinsic Cardiac Pacemaking Defects in Mice
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Cited by 2 •
2021
This protocol aims to describe a new methodology to measure intrinsic cardiac firing rate using microelectrode array recording of the whole sinoatrial node tissue to identify pacemaking defects in mice. Pharmacological agents can also be introduced in this method to study their effects on intrinsic pacemaking.
09:27
Wind Tunnel Experiments to Study Chaparral Crown Fires
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Cited by 7 •
2017
This protocol describes wind tunnel experiments designed to study the transition of a fire from the ground to the canopy of chaparral shrubs.
02:53
Reaction Rate
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2020
The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure. The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
10:29
Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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Cited by 14 •
2016
We describe the use of micro-thermocouples to estimate local temperature gradients in steady laminar boundary layer diffusion flames. By extension of the Reynolds Analogy, local temperature gradients can be further used to estimate the local mass burning rates and heat fluxes in such flames with high accuracy.
FAQs
Synaptic inputs influence firing rate by changing the neuron’s membrane potential. Depolarizing inputs move the membrane potential toward the level required to trigger an action potential, whereas insufficient input leaves threshold unreached. As the balance and strength of synaptic effects change, the neuron may generate spikes more or less frequently, allowing firing rate to reflect changing neural circuit activity.
After an action potential, the refractory period restricts how soon another spike can occur. This interval prevents successive spikes from occurring without limitation, so it places an upper constraint on firing rate. In bioengineering measurements, the refractory period helps explain why increased stimulation or synaptic input does not necessarily produce an unlimited rise in spikes per second.
Threshold acts as the decision point linking membrane-potential changes to spike generation. Inputs that depolarize the membrane enough to reach threshold can produce an action potential, while smaller changes may not. Consequently, modulation of input strength or membrane potential can shift whether spikes occur and can alter the resulting firing rate used to characterize neural activity.
A practical measurement determines how many action potentials occur during a defined time interval and reports the result as spikes per second. Electrophysiological recordings provide the signal from which these events can be characterized. Consistent time windows and clear identification of spikes are important because the calculated rate is used to compare neural activity across conditions or engineered-device experiments.
In brain-computer interfaces and neuroprostheses, firing rate provides a measurable feature of neural activity that can support evaluation of device performance. Engineers can examine how recorded neural signals change during device operation or interaction with nervous tissue. These measurements help characterize neural responses and inform systems designed to interpret activity or provide stimulation.
Firing rate offers an outcome for assessing how stimulation changes neural activity. By comparing spikes per second before and after a stimulation condition, investigators can evaluate whether the engineered system influences neuronal firing. This is relevant when studying device interactions with nervous tissue, optimizing stimulation approaches, or examining activity patterns associated with abnormal neurological conditions.