A researcher holds a human brain in a laboratory at Northwestern University in Chicago, July 29, 2013. (AP Photo/Scott Eisen)
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The deep folds that give the adult human brain its wrinkled walnut appearance were Nature's solution to fitting a large, powerful processor into a small skull.On Monday, a team of researchers from the United States and Europe said the folds can be explained by physics – a discovery that may have important implications for understanding certain brain disorders.Folds in the cortex develop through buckling in weak spots which develop as the foetal brain grows, they said.The brains of human fetuses are smooth for about the first 20 weeks, when folding begins and continues until the child is about 18 months old.The physical explanation for brain folds was first proposed by Harvard scientists 40 years ago.
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