Silence, we are…thinking!
Rat brain coronal section at the level of the dorsal (left) and ventral hippocampus (right). The immediate early genes mRNA of Homer1a (green) and Arc (red) revealed by fluorescence double “In situ” hybridization technique allow us to capture the temporal activation of neurons occurring 25-35 min (Homer) and 5-10 min (Arc) before. Blue: nuclear staining with DAPI. Scale 2000 μm.