Significance of the encephalometric parameters of human corpus callosum and medial hemispheric surface.

11 encephalometric parameters of the corpus callosum and medial hemispheric surface have been measured on 50 human brains fixed in 7% formaline solution. The measurement of linear parameters has been made by using a standardized encephalometric system of reference, based on the bicommissural line which has been widely used in neurosurgery. The applied statistical procedures have shown that the following variables are the most successful in the evaluation and prediction of the change of the midsagittal cross-sectional corpus callosum area in the following order: the thinnest part of the corpus callosum, the corpus callosum length and medial hemispheric border. Their change for the unit value causes an average change of the corpus callosum midsagittal section surface area for the value of the partial regression coefficient with which they are connected. The chosen variables explain only the 45% variability of the cross-sectional corpus callosum surface area, and the remaining variability belongs to some other variables which have not been included in present investigation. The variability of the hemispheric length (74%), the corpus callosum length (65%) and medial hemispheric border length (64%) is most adequately explained on the basis of chosen variables.