The picture blends four Hadamard Microscopy maps obtained from one acute brain slice. The leftmost band shows expression of eTsChR, a blue-shifted channelrhodopsin actuator. The middle left band shows expression of H2B-jRGECO1a, a red-shifted nuclear Calcium reporter. The middle right band shows the diversity of baseline responses to an optogenetic stimulation protocol, colored by their PCA projection. The rightmost band shows inhibition of response upon application of phenytoin, colored in the magenta-green axis with green indicating stronger inhibition. For more information, see article by Farhi et al. (pages 4889–4908).