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Bar histograms display NTS neuronal-evoked activity during repeated stimulation of vagal afferents every 10 min. A: consistent evoked activity with stimulation of vagal afferents. B and C: EA reduced evoked activity for at least 60 min through GABA mechanism. Blockade with gabazine (C) reversed the effect of EA (c) compared with preblockade (b) in contrast to saline (B). Letters a-c in bars correspond with peristimulus histograms (C).
