Evolution of the brain | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-05-10

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Evolution_of_the_brain


00:01:01 1 Early history of brain development
00:08:52 2 Role of embryology in the evolution of the brain
00:10:17 3 Randomizing access and scaling brains up
00:12:23 4 Brain re-arrangement
00:15:43 5 Genetic factors contributing to modern evolution
00:19:02 6 Evolution of the human brain
00:24:44 6.1 Evolution of the neocortex
00:26:45 7 See also



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Speaking Rate: 0.7907253405883077
Voice name: en-US-Wavenet-F


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- Socrates


SUMMARY
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The principles that govern the evolution of brain structure are not well understood.
Brain to body size does not scale isometrically (in a linear fashion) but rather allometrically. Small bodied mammals have relatively large brains compared to their bodies whereas large mammals (such as whales) have smaller brain to body ratios. If brain weight is plotted against body weight for primates, the regression line of the sample points can indicate the brain power of a primate species. Lemurs for example fall below this line which means that for a primate of equivalent size, we would expect a larger brain size. Humans lie well above the line indicating that humans are more encephalized than lemurs. In fact, humans are more encephalized than all other primates.