Discover Magazine has an interesting Carl Zimmer article on one of the most intriguing questions in neuroscience - why do we have two cortical hemispheres? And why are they not quite the same?
It turns out that the 'brain of two halves' is incredibly common in the animal kingdom and that many creatures also show the behavioural lateralisation that we most readily see in humans as someone being left or right handed.
But it's no entirely sure why we, or indeed, or animal compatriots, have evolved this way, although various theories are kicking around:
David Stark of Harvard Medical School recently found additional clues about lateralization in his studies of 112 different regions in the brains of volunteers. He and his collaborators discovered that the front portions of the brain are ge...
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