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Related Concept Videos

Action Potential01:14

Action Potential

Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Propagation of Action Potentials01:23

Propagation of Action Potentials

The propagation of an action potential refers to the process by which a nerve impulse, or "action potential," travels along a neuron.
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Action Potentials01:41

Action Potentials

Overview

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Related Experiment Video

Updated: Jun 16, 2026

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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Decoupling action potential bias from cortical local field potentials.

Stephen V David1, Nicolas Malaval, Shihab A Shamma

  • 1Institute for Systems Research, University of Maryland, College Park, MD 20742, USA. svd@umd.edu

Computational Intelligence and Neuroscience
|February 20, 2010
PubMed
Summary
This summary is machine-generated.

High-impedance electrodes allow simultaneous recording of neuronal population activity via local field potential (LFP) and single-neuron activity. We developed a filtering method to remove spike-related artifacts from LFP signals, improving data accuracy.

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Concurrent Recording of Co-localized Electroencephalography and Local Field Potential in Rodent

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Area of Science:

  • Neuroscience
  • Computational Neuroscience

Background:

  • Simultaneous recording of local field potentials (LFPs) and single-unit activity is increasingly common.
  • High-impedance electrodes enable isolation of single neuron activity alongside LFPs.
  • Single neuron action potentials and synaptic potentials can potentially bias LFP signals, creating artifactual synchrony and tuning.

Purpose of the Study:

  • To develop and validate a method for removing spike-correlated components from LFP recordings.
  • To assess the impact of local spiking activity on LFP power and neuronal population measures.
  • To improve the accuracy of LFP-based analyses in neurophysiological studies.

Main Methods:

  • Linear filtering techniques were employed to identify and remove spike-correlated features from LFP data.
  • The filtering procedure was tested using simulated data and actual recordings from the primary auditory cortex.
  • The method is applicable to both well-isolated single units and multiunit activity.

Main Results:

  • Local spiking activity was found to account for a substantial portion of LFP power across many recording sites.
  • Removal of spike-correlated components significantly affected measurements of auditory tuning derived from LFP data.
  • The filtering method effectively reduced the influence of individual neuron activity on the population LFP signal.

Conclusions:

  • Spike-correlated activity is a significant contributor to LFP signals and can influence interpretations of neuronal population dynamics.
  • The developed filtering technique offers a valuable tool for neurophysiologists to obtain more accurate LFP recordings.
  • This method enhances the reliability of LFP analysis, particularly for studying neuronal tuning and synchrony.