MR IMAGING OF THE CORPUS-CALLOSUM

The corpus callosum is the major axonal commissure of the brain, conne cting the two cerebral hemispheres and providing communication between the cortical and subcortical neurons. With MR imaging in the sagittal plane, the corpus callosum can be depicted in great detail. We review the normal anatomy, development, and process of myelination of the co rpus callosum. The MR features of various pathologic conditions involv ing the corpus callosum are described. Finally, we discuss the evolvin g role of MR imaging in neuropsychiatric diseases with respect to the corpus callosum.