Local field potential: Difference between revisions

The local field potential is believed to represent the [[neural synchronization|synchronised input]] into the observed area, as opposed to the [[Voltage spike|spike]] data, which represents the output from the area. In the LFP, high-frequency fluctuations in the potential difference are filtered out, leaving only the slower fluctuations. The fast fluctuations are mostly caused by the short inward and outward currents of action potentials, while the direct contribution of action potentials is minimal in the LFP. The LFP is thus composed of the more sustained currents in the tissue, such as the [[synapse]|synaptic]] and [[Somatology|somato]]-[[dendritic]] currents. The major slow currents involved in generating the LFP are believed to be the same that generate the [[postsynaptic potential]] (PSP). It was originally thought that [[Excitatory postsynaptic potential|EPSP]]s and [[Inhibitory postsynaptic potential|IPSP]]s were the exclusive constituents of LFPs, but phenomena unrelated to synaptic events were later found to contribute to the signal (Kobayashi 1997; Kamondi 1998).