Localization and density of retrogradely-labelled cells in the MD following CTB injection into ALO, PLO, or PVO. (A) Shaded areas correspond to superimposed hand drawings of the labelling in each brain included in the analysis, using an opacity value proportional to the labelling density level. n ALO = 6, n PLO = 5, n PVO = 4 injections. (B) Micrographs from representative brain with successful triple labelling. c: central; l: lateral; m: medial; AF: Alexa Fluor; ALO: lateral orbitofrontal cortex, anterior area; CTB: cholera toxin subunit B; MD: mediodorsal nucleus of the thalamus; PLO: lateral orbitofrontal cortex, posterior area; PVO: ventral orbitofrontal cortex, posterior area.