FIGURE 3.

Schematic coronary view of the dorsal thalamus. The dorsal striatum is located dorsally to the nucleus accumbens and can be subdivided into four territories according to the spatial distribution. The four territories of the dorsal striatum include the DL striatum, the DM striatum, the VL striatum, and the VM striatum. MORs are highly expressed on MSNs and Ci in the dorsal striatum. The DL striatum and DM striatum were reported to be involved in the drug addiction process (denoted as red star), while little attention has been given to the role of the VL and VM striatum (denoted as blue star) in drug addiction. Ci, cholinergic interneuron; DL, dorsolateral; DM, dorsomedial; MSN, medium spiny neuron;; VL, ventrolateral; VM, ventromedial