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. 2015 Feb 4;35(5):1965–1978. doi: 10.1523/JNEUROSCI.3422-13.2015

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Copyright © 2015 the authors 0270-6474/15/351965-14$15.00/0

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Figure 6. — VTA neurons are either excited or inhibited by footpad stimulation (10 mA, 0.5 μs at 2 Hz). A, B, Examples of footpad-responsive neurons, one excited and the other inhibited. C, Population response of cocaine-excited neurons to footpad stimulation. Notice that the proportion of excited neurons was higher than the proportion of inhibited neurons by footpad stimulation (Fisher's exact test, p < 0.01). D, Population response of cocaine-excited neurons to footpad stimulation. Similar proportions of neurons were excited and inhibited by footpad stimulation. Error bars are SEM.