a, Three-dimensionally reconstructed vIRtPV presynaptic neurons (vIRt-pre, cyan, n= 3) and vibrissal premotor neurons (vibrissa-pre, magenta, n = 4) in the Allen Mouse Brain CCF in coronal planes. b, Density analysis of presynaptic neurons (vIRt-pre, cyan, n = 3) and vibrissal premotor neurons (vibrissa-pre, magenta, n = 4) in coronal and sagittal planes. DN, dentate nucleus; IP, interposed nucleus.