Definition
Low-frequency component of the continuous time-varying electrophysiological signal recorded using intracranial extracellular electrodes placed inside the visual cortex. It is dominated by local cooperative activity of neural networks occurring in a volume of tissue around the tip of the electrode.
Detailed Description
Biophysical Origin
It is thought that the main contribution to the local field potential (LFP) derives from synchronous activation of neurons in the surrounding cortex. The LFP represents the sum over typically many thousands of local electrical fields that are generated within individual neurons. When a neuron is activated by the arrival of an excitatory postsynaptic potential on its dendrite, charged ions pass through its membrane which normally acts as an electrical insulator (Eccles 1951). An inflow of positive ions is termed current sink by convention, whereas an outflow of positive ions is termed current source. Since inflowing positive ions must be...
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Rainer, G. (2014). Local Field Potential in the Visual System. In: Jaeger, D., Jung, R. (eds) Encyclopedia of Computational Neuroscience. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7320-6_722-1
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DOI: https://doi.org/10.1007/978-1-4614-7320-6_722-1
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Local Field Potential in the Visual System- Published:
- 21 June 2019
DOI: https://doi.org/10.1007/978-1-4614-7320-6_722-2
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Local Field Potential in the Visual System- Published:
- 10 March 2014
DOI: https://doi.org/10.1007/978-1-4614-7320-6_722-1