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How do Brodmann areas map the cortex?

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In 1909, Korbinian Brodmann (1868–1918) tried to standardize the discussion of brain anatomy by creating a map of the cortex. He first divided the cortex into distinct regions based on the way neurons were organized (cytoarchitecture). He then numbered these regions from one to fifty-two. Only forty-five Brodmann areas are found in the human brain; the other seven are found in the monkey brain. Although brain structure may vary somewhat across individuals, this system has been extremely helpful for neuroscientists, giving them a common language with which to talk about brain anatomy. Nonetheless, there is still variation in the terms used, as many brain structures have several different names.

The Handy Psychology Answer Book

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