Comparative MRI and histology in the inferior colliculus and olfactory bulbs. a, Slices at the inferior colliculus from the wild-type and cdf/cdf average MRI atlases. b, Corresponding H&E-stained sections. c, Slices at the olfactory bulb from the from the wild-type and cdf/cdf average MRI atlases. d, Corresponding H&E sections. e, Enlarged view of the H&E sections. GCL, Granule cell layer; IPL, internal plexiform layer; MCL, mitral cell layer; EPL, external plexiform layer; GL, glomerular layer. Note that the IPL is absent in the cdf/cdf mutant. Scale bars, 1 mm.