The majority of our functional brain is distributed over the outer surface layer of the brain, and to increase the area that's available for mental capacity, the brain surface is highly folded.
Hovedparten af vores funktionelle hjerne er fordelt over hjernens ydre overfladelag. For at gøre overfladen - der rummer den mentale kapacitet - større, er hjernens overflade fuld af foldninger.