An evolutionary increase in the complexity or relative size of the brain, involving a shift of function from noncortical parts of the brain to the cortex.
- Moreover, a trend toward increased encephalization within many mammalian taxa is widely recognized.
- The increased encephalization of the human fetus - the size of its brain and therefore its skull - compared with any other animal has meant that the female pelvis has had to expand even further to ensure safe passage.
- For example, it is known that major increases in encephalization occurred only after the appearance of early Homo.
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