The term "gyral" refers to the folds or convolutions of the brain's cortex, which create its distinct shape and help to increase its surface area for processing information. Some synonyms for "most gyral" might include "highly convoluted," "extremely folded," or "deeply furrowed." Other related terms could include "cortical folding," "brain wrinkling," or "gyrencephaly," which refers to the increased complexity of brain structure seen in humans compared to other animals. Understanding the intricacies of cortical folding is an important area of research in neuroscience, as it can provide insights into the development of various neurological conditions and disorders.