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- W2093965978 abstract "Interpretations of local field potentials (LFPs) are typically shaped on an assumption that the brain is a homogenous conductive milieu. However, microscale inhomogeneities including cell bodies, dendritic structures, axonal fiber bundles and blood vessels are unequivocally present and have different conductivities and permittivities than brain extracellular fluid. To determine the extent to which these obstructions affect electrical signal propagation on a microscale, we delivered electrical stimuli intracellularly to individual cells while simultaneously recording the extracellular potentials at different locations in a rat brain slice. As compared with relatively unobstructed paths, signals were attenuated across frequencies when fiber bundles were in between the stimulated cell and the extracellular electrode. Across group of cell bodies, signals were attenuated at low frequencies, but facilitated at high frequencies. These results show that LFPs do not reflect a democratic representation of neuronal contributions, as certain neurons may contribute to the LFP more than others based on the local extracellular environment surrounding them." @default.
- W2093965978 created "2016-06-24" @default.
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- W2093965978 date "2013-02-13" @default.
- W2093965978 modified "2023-10-12" @default.
- W2093965978 title "Microscale Inhomogeneity of Brain Tissue Distorts Electrical Signal Propagation" @default.
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- W2093965978 doi "https://doi.org/10.1523/jneurosci.3502-12.2013" @default.
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