Measuring excitation/inhibition balance through field potentials
Rodriguez-Sanchez, J.; Diehl, G. W.; Cunningham, P. J.; Pinotsis, D.; Adams, R. A.; Redish, A. D.
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Several electroencephalography-based metrics have been proposed to index excitation/inhibition balance (E/I). We used single-unit and local field potential recordings from rat medial prefrontal and orbitofrontal cortex and mouse visual cortex and hippocampus to evaluate four candidate metrics against empirically-measured E/I. While 1/f slope and gamma oscillations showed region and context dependencies, broadband (6-80 Hz) and high gamma (80-150 Hz) power consistently correlated with E/I, supporting their use as proxy measures.
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