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. 2016 Aug 12;6:31385. doi: 10.1038/srep31385

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Copyright © 2016, The Author(s)

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Abscissa: frequency of electrical brain stimulation in Hz. Ordinate: ICSS rate maintained by each brain stimulation frequency, expressed as percent maximum control reinforcement rate (%MCR). Filled points represent frequencies at which ICSS rates were statistically different from vehicle rates (p < 0.05). All data show mean ± SEM for 6 rats.