What type of fibers does the corpus callosum primarily consist of?

The corpus callosum primarily consists of commissural fibers, which are crucial for interhemispheric communication. These fibers connect corresponding areas of the right and left cerebral hemispheres, allowing for the integration of sensory information and coordinated responses between the two sides of the brain. This structure plays a vital role in facilitating complex functions such as language, movement, and overall cognitive processing by allowing both halves of the brain to work together seamlessly.

In contrast, ascending sensory fibers are primarily responsible for transmitting sensory information from the body to the brain, while descending motor fibers carry commands from the brain to the muscles. Lastly, interneurons are primarily involved in local processing within the brain and spinal cord, facilitating communication between sensory and motor pathways. Therefore, understanding the specific role of commissural fibers elucidates how the corpus callosum functions in connecting the two hemispheres effectively.