Wrinkled Brain (IMAGE) University of California - San Diego Caption The human brain’s complex surface folding allows the organ to squeeze 2.6 square feet of cerebral cortex tissue into the skull. Credit California Institute for Regenerative Medicine Usage Restrictions Use photo credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.