Dopaminergic regulation of striatal efferent pathways.

In the past year there has been a growing debate about the distribution of dopamine receptors in striatal efferent pathways. As is often the case, different approaches lead to different perspectives. Nevertheless, the available data can be reconciled with a model in which D1 and D2 dopamine receptors are segregated in the distal dendrites and axonal terminal fields of striatonigral and striatopallidal neurons, but intermingled in the soma and proximal dendrites.