Summary of subcortical projections to Po and VPM. Graphic summary of the relative abundance of retrogradely labeled cells in the forebrain, midbrain, hindbrain, and spinal cord in all cases analyzed in this study. Ipsilateral (I) and contralateral (C) projections are represented separately for each case. Relative abundance of labeled cells is represented by shades of gray. Asterisks indicate the glutamatergic structures (red) and GABAergic structures (blue) that were quantified (Fig. 11).