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In this study, the stimulation and recording electrodes were all microwire array electrodes. The recording microwire array was arranged in 4×4 array (nickel-titanium, 25 μm diameter, 300 μm interelectrode spacing, 8 mm length, Suzhou Kedou Brain Computer Technology Co., Ltd), and two silver wires with 125 μm diameter were reserved at the electrode connector as ground wires. The stimulation microwire array was arranged in 2×2 array (tungsten, 50 μm diameter, 250 μm interelectrode spacing, 10 mm length, Beijing Plexon Co., Ltd). Nissl staining was performed to determine the electrode position, only electrophysiological data of rats with correctly electrode implantation was used in subsequent analysis.
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