![]() SEAT OF LEARNING: The brain’s hippocampus, critical to spatial cognition and memory, is shaped by kids’ experiences-exploring environments and navigating space. It seemed that the lack of oxygen to his brain as an infant, known as hypoxia, and the subsequent convulsions, had caused severe damage to the cells in this specific structure and stunted its growth. They discovered that his hippocampus, the bilateral brain region deep in the temporal lobe, was abnormally small, about half the size of a healthy hippocampus. ![]() The cause of these strange impairments was revealed when neuroscientists used magnetic resonance techniques to look at his brain. He didn’t remember familiar environments, or where his belongings were kept, or routes from one place to another. He could remember facts but not episodes from the past.īy the time Jon was 19, he couldn’t find his way anywhere. Jon’s IQ was normal, he could read and write, and did well at school. He didn’t recall watching TV or what happened at school or what book he read. About a year later his parents began to notice that Jon couldn’t remember things that happened in his daily life. For two months he lived in an incubator and eventually grew into a healthy baby and toddler. ![]() When Jon was born prematurely at 26 weeks, he weighed around two pounds and had trouble breathing on his own. ![]()
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