What is the corpus callosum?
The corpus callosum is the largest midline structure of the brain. • It begins to develop around the 10th
to 11th week of pregnancy • Consists of over 200 million nerve fibers that
connect the two hemispheres of the brain • Transfers and integrates motor, sensory, and cognitive
information between the cerebral hemispheres • Continues to mature throughout pregnancy
and into childhood and adolescence The type of callosal abnormality that develops depends on the cause and timing of the disruption to prenatal brain development. If the corpus callosum does not form during the prenatal period, it will not develop later. Those with ACC can be affected in a range that runs from seemingly normal to seriously handicapped. The only way to detect ACC is through an MRI. There is no cure and the affects are permanent. As the affected individual grows, the disorder doesn’t get worse—but then, it doesn’t get better. Because it is a birth disorder, infants with obvious signs and symptoms such as lack of motor skill development, walking, talking, etc., are most likely to be diagnosed. It’s those with less severe symptoms who are usually diagnosed later in life— or not at