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Experiment design: (A). The rat after surgical implantation; (B). The frontal view of the rat brain (modified from [41]); (C). The cannulas (1) and electrodes (2 and 3) location on the rat’s skull. (D). After surgical implantation of the electrodes and the cannula unit, the background ECoG was recorded, and analyzed 3 days later. CDX, the GJ blocker carbenoxolone, 50 mM, 4 µL; 4-AP, 4-aminopyridine, a K- channel inhibitor, 25 mM, 2 µL (for other explanations, see text).
