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5/2/15 Cover

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‘Unique’ human brain regions similar to monkeys’ brains

brain scan

Brain scans showed that regions thought to be unique to humans share similarities with the brains of monkeys.

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Monkeys may have rudimentary brain wiring that later evolved into the connections that gave humans the ability to understand language, think flexibly and make decisions.

Brain scans of 25 humans and 25 macaques show that 11 components of the ventrolateral frontal cortex, located behind the temples, were similarly wired in both species. The results suggest that humans did not develop completely new and specialized brain systems for certain types of complex thought, researchers report January 28 in Neuron.

The scans also show that macaques do not have the lateral frontal pole, which helps humans with strategic planning, decision-making and multitasking.

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