Definition
The local field potential (LFP) is the electric potential in the extracellular space around neurons. The LFP is generated by electric currents and charges and is also interacting in several possible ways with the extracellular medium, such as capacitive interactions, polarization, or trough ionic diffusion. These types of interaction confer specific frequency dependence of the extracellular electric potential and thus are important for correctly interpreting the LFP, as well as estimating the underlying neuronal sources (inverse problem).
Detailed Description
Introduction
In contrast to the electroencephalogram (EEG) recorded at the surface of the scalp, the local field potential (LFP) is recorded by inserting microelectrodes into neural tissue, and it is recordable using a variety of electrode systems, such as metal or silicon electrodes or glass micropipettes. Early studies established that action potentials have a limited participation to EEGs or LFPs (Bremer 1938, 1949;...
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Further Reading
Koch C, Segev I (eds) (1998) Methods in neuronal modeling, 2nd edn. MIT Press, Cambridge, MA
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Bédard, C., Destexhe, A. (2014). Local Field Potential Interaction with the Extracellular Medium. In: Jaeger, D., Jung, R. (eds) Encyclopedia of Computational Neuroscience. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7320-6_720-1
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DOI: https://doi.org/10.1007/978-1-4614-7320-6_720-1
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Local Field Potentials: Interaction with the Extracellular Medium- Published:
- 13 January 2020
DOI: https://doi.org/10.1007/978-1-4614-7320-6_720-2
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Local Field Potential Interaction with the Extracellular Medium- Published:
- 15 March 2014
DOI: https://doi.org/10.1007/978-1-4614-7320-6_720-1