Really interesting article from today's WSJ on the significance and function of each hemisphere of the brain. Snippet below, check the full version here.
In humans, the left hemisphere controls the grasping right hand and the bits of language that enable us to pin down meaning unambiguously. It helps us manipulate and use the world, in pursuit of our aims. The left hemisphere's world is sharply delineated and certain, along the lines of the general's strategy map on the command room wall, where the complexity of the world is stripped away. Yet we still need to see the essentially human world as it is before we simplify and disconnect it. A general needs to be in touch with the world in which his soldiers actually fight. The knowledge that is mediated by the left hemisphere is knowledge within a closed system. It has the advantage of perfection, but such perfection is bought ultimately at the price of emptiness.
The right hemisphere's take on the world is far more complex and nuanced. Instead of distinct mechanisms, the right hemisphere sees interconnected, living, embodied entities. In communication the right hemisphere recognizes all that is nonverbal, metaphorical, ironic or humorous, where the left is literalistic. The right is at ease with ambiguity and the idea that opposites may be compatible.
There is a reason we have two hemispheres: We need both versions of the world.
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