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. 2013 May 24;7:41. doi: 10.3389/fnint.2013.00041

Figure 1.

Figure 1

The influence of the DRN on the direct and indirect pathways. Dopaminergic neurons of the SNc inhibit the indirect pathway and stimulate the direct pathway from the cortex to the thalamus. Serotonin from the DRN projections to the striatum increase DA release and projections from the cortex inhibit DRN firing. The details of basal ganglia BG circuitry in the direct and indirect pathways is omitted. References for the influences are given in the text. There are many descending projections to the DRN; nucleus X represents one of these that may excite or inhibit the DRN.