Miguatemala Health Blog

The nematode worms have no more than a few hundreds of neurons throughout the nervous system, when the human being has about 20 billion just in the neocortex. Among mammals, Homo sapiens is an animal in which the ratio of brain mass and body mass is higher (brain mass / body mass 1/46-48 for man, but 1 / 31 to mouse for example). Other animals have a larger brain, like the dolphin or an elephant. From the point of view of phylogenetic evolution the human brain has undergone a major expansion of the cortex. But this expansion was not uniform: some areas have increased in size more than others, for example the case of the prefrontal cortex.

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