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Arecoline induces burst firings in VTA dopaminergic neurons. (A–C) Histograms of the burst parameters in dopaminergic neurons before and after saline/arecoline treatments. (A) Burst rate, (B) the burst duration, and (C) the number of spikes per bursts. The numbers presented in the parentheses denote the number of neurons measured, while the overlaid dots are the individual data points. DA neuron: dopaminergic neuron. ** p < 0.01; NS, not significant.
