PATHOLOGY

Detailed explanation-1: -The corpus callosum is the largest white matter structure in the brain, consisting of 200–250 million contralateral axonal projections and the major commissural pathway connecting the hemispheres of the human brain.

Detailed explanation-2: -Anatomically from anterior to posterior, the corpus callosum is composed of four parts based on previous histological findings: the rostrum, genu, body, and splenium, each responsible for connecting distinct areas of the cortex.

Detailed explanation-3: -There are approximately 300 million axons (nerve fibres) in an average corpus callosum. It is located in the white matter of the cerebrum and is around 10cm long at the midline. This neural bridge is the largest white matter structure in the brain and only evolved in placental mammals.