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. Author manuscript; available in PMC: 2011 Jun 27.
Published in final edited form as: Drug Alcohol Depend. 2009 Mar 4;102(1-3):88–94. doi: 10.1016/j.drugalcdep.2009.01.005

Figure 3. Dorsal striatal activity during right-hand movement.

Figure 3

The dorsal striatum was divided into four subregions: left (contralateral) and right (ipsilateral) caudate, left and right putamen. A schematic representation of the caudate (red) and putamen (blue) on the contralateral (solid) and ipsilateral (dotted) sides is displayed (a). The distribution of dorsal striatal activity is shown for controls (b) and cocaine users (c) during both internally-guided and externally-guided movement. In controls, activity during internally-guided movement was weighted towards the contralateral caudate. Activity during externally-guided movement was weighted towards the contralateral putamen. In contrast, dorsal striatal activity in cocaine users was evenly distributed among the four regions for both tasks (as revealed by Chi Square goodness of fit tests (p > 0.05)).