The cerebral cortex is wrinkled in order to increase the surface area in a small volume.

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The wrinkles, or convolutions, in the cerebral cortex allow for more surface area to fit within the relatively small volume of the skull. This increased surface area is important for the numerous functions of the cerebral cortex, including processing sensory information, controlling movement, and carrying out complex cognitive processes such as reasoning and language.

The Cerebral Cortex Is Wrinkled in Order to Increase the Surface