Electrocorticography (ECoG) is one of the electrophysiological recording techniques, which has several beneficial features including low invasiveness, good signal quality, and long-term stability. We developed a novel high-density micro-ECoG array and evaluated it on the rat barrel cortex. Results of barrel-column mapping showed better performance of a high-density array on topographic delineation compared to a low-density array. Bending directions of a whisker could be estimated reliably using recorded ECoG signals.
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