Morphological features of neurons recorded in dLGN and vLGN. A, In situ hybridization data collected from coronal sections of adult C57BL/6 mice comparing the distribution of α4 and δ subunits in the hippocampal CA regions, dentate gyrus (DG), neocortex (Cx), dLGN, and vLGN. B, The relative recording locations of all cells used in this study are shown superimposed on a single representative image of a thalamic slice preparation. IGL, Intergeniculate leaflet; OT, optic tract. C, After electrophysiological recordings, it was possible to recover a number of cells for confocal imaging. The results of this imaging are shown for representative neurons in dLGN and vLGN.