An elevated ridge of cerebral tissue is referred to as a gyri (plural: gyri). These gyri are the folds or ridges on the surface of the brain, which help to increase its surface area. The brain is made up of many folds and grooves, with the grooves being called sulci. Together, the gyri and sulci create the characteristic wrinkled appearance of the brain.
Gyri play a crucial role in the functioning of the brain, as different gyri are associated with various cognitive functions and processes. For example, the precentral gyrus is involved in motor control, while the postcentral gyrus is key in sensory perception. The arrangement and organization of these gyri contribute to the complexities of human cognition and behavior.