Photomicrographs of Fos-positive neurons in representative reinstating mice (A and C) and non-reinstating mice (B and D) from the lateral habenula (bregma -1.46; scale bar 100 µm) and the paraventricular nucleus of the hypothalamus (bregma -0.70-0.94; scale bar, 200 µm).

<p>Photomicrographs of Fos-positive neurons in representative reinstating mice (A and C) and non-reinstating mice (B and D) from the lateral habenula (bregma -1.46; scale bar 100 µm) and the paraventricular nucleus of the hypothalamus (bregma -0.70-0.94; scale bar, 200 µm).