Clearly, the brain is not at all like a machine: A study of six adults who each had half of their brain removed or partially removed as children is helping us understand how they retain language and thinking skills. This radical surgery (hemispherectomy) is done when epileptic seizures have severely damaged one lobe of the brain. Sensory, motor, or language deficits sometimes follow but many patients retain normal functions with only half a brain… In fact, as the open-access paper reports, the six people with up to half their brain removed (see Figure 1 from the paper, right) had stronger connections than the six with whole brains. “Some people think and speak with only half a brain” at Mind Matters Read More ›
The remarkable “powers” of evolution are now shown to degrade (aka “mutate”) the human genes essential to intelligence.
Remarkably, they found that some of the same genes that influence human intelligence in healthy people were also the same genes that cause impaired cognitive ability and epilepsy when mutated, networks which they called M1 and M3.