Which component is NOT part of the limbic system?

The corpus callosum is indeed not considered a part of the limbic system. The limbic system is primarily involved in emotional responses, memory processing, and the regulation of certain autonomic functions. It includes structures such as the amygdala, which is crucial for emotion processing; the fornix, which serves as a major output tract of the hippocampus important for memory; and the cingulate cortex, which plays a role in emotion formation and processing.

In contrast, the corpus callosum is a large bundle of nerve fibers that connects the left and right hemispheres of the brain, facilitating interhemispheric communication. Therefore, while it is vital for coordinating activities between the two halves of the brain, it does not fulfill the emotional and memory-related roles characteristic of the limbic system.