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Home / Health News / Smarter people need more blood flow in the brain

Smarter people need more blood flow in the brain

Your intelligence is not related to your brain size; rather it is linked more closely to the supply of blood to your brain.

By: Agencies   | | Published: September 1, 2016 6:46 pm
Tags: Brain  Brain health  Drinking Water  
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Your intelligence is not related to your brain size; rather it is linked more closely to the supply of blood to your brain. A University of Adelaide-led project, which has overturned the theory of the evolution of human intelligence, showed that the human brain evolved to become not only larger, but more energetically costly and blood thirsty than previously believed. The research team calculated how blood flowing to the brain of human ancestors changed over time, using the size of two holes at the base of the skull that allow arteries to pass to the brain. The findings allowed the researchers to track the increase in human intelligence across evolutionary time. Brain size has increased about 350 percent over human evolution, but we found that blood flow to the brain increased an amazing 600 percent, said project leader Emeritus Roger Seymour, from the University of Adelaide. We believe this is possibly related to the brain’s need to satisfy increasingly energetic connections between nerve cells that allowed the evolution of complex thinking and learning. To allow our brain to be so intelligent, it must be constantly fed oxygen and nutrients from the blood, Seymour continued. (Read: Thirst switch in our brain found!) Also Read - Genes linked to common brain disorder, Chiari 1 malformation, identified

Also Read - Have more red wine and cheese to enjoy better cognitive health in old age



The more metabolically active the brain is, the more blood it requires, so the supply arteries are larger. The holes in fossil skulls are accurate gauges of arterial size, he added. The study was a new collaboration between the Cardiovascular Physiology team in the School of Biological Sciences at the University of Adelaide and the Brain Function Research Group and Evolutionary Studies Institute at the University of the Witwatersrand. Co-author Edward Snelling, University of the Witwatersrand, said, Ancient fossil skulls from Africa reveal holes where the arteries supplying the brain passed through. The size of these holes show how blood flow increased from three million-year-old Australopithecus to modern humans. The intensity of brain activity was, before now, believed to have been taken to the grave with our ancestors. Honours student and co-author Vanya Bosiocic had the opportunity to travel to South Africa and work with world renowned anthropologists on the oldest hominin skull collection, including the newly-discovered Homo naledi. Throughout evolution, the advance in our brain function appears to be related to the longer time it takes for us to grow out of childhood. It is also connected to family cooperation in hunting, defending territory and looking after our young, Bosiocic said. The emergence of these traits seems to nicely follow the increase in the brain’s need for blood and energy, she added. The study has been published in Royal Society Open Science. (Read: Thirsty? This is why!) Also Read - Spend 10 mins in the sun every morning to sharpen your memory

Source: IANS

Photo source: Getty images (Image for representational purpose only)

Published : September 1, 2016 6:46 pm
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