What are the furrows in the brain?

Furrows in the brain, known as sulci, are the grooves or indentations that separate the raised areas called gyri. These structures are crucial for increasing the surface area of the cerebral cortex, allowing for greater neural processing capacity. Sulci play a significant role in distinguishing different regions of the brain and are involved in various cognitive functions. Their patterns can also differ among individuals and are used in neuroanatomy for brain mapping.