A long-overlooked brain region may be key to complex thought

The ornately folded outer layer of the human brain, the cerebral cortex, has long received nearly all the credit for our ability to perform complex cognitive tasks such as composing a sonata, imagining the plot of a novel or reflecting on our own thoughts. One explanation for how we got these abilities is that the cortex rapidly expanded relative to body size as primates evolved — the human cortex has 10 times the surface area of a monkey’s cortex, for example, and 1,000 times that of a mouse. ….[READ]