Confocal images depicting HCN1 (green) and vGluT1 (magenta) immunostaining in the PVCN (A,B), the SOC (C,D), the VNLL (E,F) and the inferior colliculus (G,H) of naked mole-rat (NMR) (left column) and mouse (right column).

<p>HCN1 immunolabelling is diffuse and faint in the PVCN, SOC and CIC nuclei of the naked mole-rat <b>(A, C, G)</b>, but more intense in the VNLL <b>(E)</b>; in contrast, strong HCN1 immunolabelling is present in the PVCN, the MSO and LSO, the VNLL and the IC of mouse <b>(B, D, F, H)</b>. Scale bars: 200 μm.