Thickness of the corpus callosum in different grades of hydrocephalus. a: Photomicrographs of the corpus callosum stained with luxol fast blue for myelin. Arrows indicate the site for thickness measurement (b) Histogram of the thickness of corpus callosum in the control and hydrocephalic brains (* p<0.05, ** p<0.001 vs control, data are means ± SEM). Ventriculomegaly is accompanied by gradual thinning of the corpus callosum. (Scale bar 75 μm).