activity mapping 1 animal experiment 1 animal tissue 1 anterior posterior axis 1 article 1 brain 1 brain-wide activity mapping 1 cross validation 1 immediate early gene 1 immunohistochemistry 1 light sheet microscopy light-sheet microscopy 1 male 1 mouse 1 neuronal ensembles 1 nonhuman 1 pipeline 1 tissue clearing 1 videorecording 1