Figure S1.
Monosynaptic inputs to ChI cells in the ventral and dorsal striatum show regional differences. Representative areas from the coronal sections of the brain injected into the NAc ChIs (A1–8) and CPu ChIs (B1–5) with the RV-mCherry. (A1) The whole brain section of the prefrontal cortex. (A2) Projecting neurons in thalamic nuclei PV, CM, MD, PC, IAD, IAM. (A3) Lateral hypothalamic area with a large number of projecting neurons. (A4) The whole brain section showing projecting neurons in the cortical areas M1 and 2, S1 and S2, insular cortical areas, central amygdaloid nuclei, ZI, and thalamic and hypothalamic nuclei. (A5) Area of the parasubthalamic nucleus contains projecting cells, while in the hippocampus small number of cells can be observed in the subiculum and CA1 area. (A6) In the more caudal area of the ventral hippocampus large number of labeled cells are found in the subiculum–CA1 regions. Cells are also visible in the VTA-PBP area. (A7) Perirhinal cortical area contains a large number of pyramidal neurons labeled with mCherry. (A8) Tegmental nuclei and dorsal raphe contain labeled cells in the lateral tegmental nuclei, and parabrachial nuclei. (B1) Labeled cells in the tegmental area that project to the CPu ChIs. Notice the absence of the labeled cells in the subiculum of the ventral hippocampus. (B2 and B5) Thalamic regions of the CPu-injected brain depicts different thalamic nuclei that project to the CPu ChIs. (B3) Substantia nigra, VTA-PBP-SN area contains a large number of cells labeled with the mCherry. Note the absence of labeled cells in the hippocampus. (B4) Whole brain image showing a large number of cortical areas that contain labeled cells, and strong labeling in the subthalamic and parasubthalamic nuclei. Scale bars in all images are 100 μm. Distance from the bregma: (A1) ∼2.10 mm, (A2) approximately −0.82 mm, (A3) approximately −2.25 mm (A4) approximately −1.58 mm, (A5) approximately −2.60 mm, (A6) approximately −3.70 mm, (A7) approximately −1.94 mm, (A8) approximately −5.0 mm, (B1) approximately −4.36 mm, (B2) approximately −1.50 mm, (B3) approximately −3.10 mm, (B4) approximately −1.70 mm, (B5) approximately −2.10 mm. Refer to the image caption for details.

Monosynaptic inputs to ChI cells in the ventral and dorsal striatum show regional differences. Representative areas from the coronal sections of the brain injected into the NAc ChIs (A1–8) and CPu ChIs (B1–5) with the RV-mCherry. (A1) The whole brain section of the prefrontal cortex. (A2) Projecting neurons in thalamic nuclei PV, CM, MD, PC, IAD, IAM. (A3) Lateral hypothalamic area with a large number of projecting neurons. (A4) The whole brain section showing projecting neurons in the cortical areas M1 and 2, S1 and S2, insular cortical areas, central amygdaloid nuclei, ZI, and thalamic and hypothalamic nuclei. (A5) Area of the parasubthalamic nucleus contains projecting cells, while in the hippocampus small number of cells can be observed in the subiculum and CA1 area. (A6) In the more caudal area of the ventral hippocampus large number of labeled cells are found in the subiculum–CA1 regions. Cells are also visible in the VTA-PBP area. (A7) Perirhinal cortical area contains a large number of pyramidal neurons labeled with mCherry. (A8) Tegmental nuclei and dorsal raphe contain labeled cells in the lateral tegmental nuclei, and parabrachial nuclei. (B1) Labeled cells in the tegmental area that project to the CPu ChIs. Notice the absence of the labeled cells in the subiculum of the ventral hippocampus. (B2 and B5) Thalamic regions of the CPu-injected brain depicts different thalamic nuclei that project to the CPu ChIs. (B3) Substantia nigra, VTA-PBP-SN area contains a large number of cells labeled with the mCherry. Note the absence of labeled cells in the hippocampus. (B4) Whole brain image showing a large number of cortical areas that contain labeled cells, and strong labeling in the subthalamic and parasubthalamic nuclei. Scale bars in all images are 100 μm. Distance from the bregma: (A1) ∼2.10 mm, (A2) approximately −0.82 mm, (A3) approximately −2.25 mm (A4) approximately −1.58 mm, (A5) approximately −2.60 mm, (A6) approximately −3.70 mm, (A7) approximately −1.94 mm, (A8) approximately −5.0 mm, (B1) approximately −4.36 mm, (B2) approximately −1.50 mm, (B3) approximately −3.10 mm, (B4) approximately −1.70 mm, (B5) approximately −2.10 mm.

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