Tuesday, November 30, 2010

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Ominidi, umanoidi, umani

The title highlights the evolutionary process that characterizes the journey of our species (Homo sapiens sapiens) through the depths of time. As mentioned in a previous post, we are confronted with an intermediate stage between the hominid and human. Compared with the first attempts evolutionary
we definitely lost the sacred connection with nature, which characterized our ancestor, a mammal similar to primates, but with a new anatomic morphology: a bizarre mosaic, where the upright position, the opposing thumb and a larger head volume led to an evolutionary leap of gigantic proportions.
But the development of a hominid brain can not remotely compete with the sophistication of human neural current. The famous tripartite division of the brain proposed by McLean in the late fifties of the last century showed three different developmental levels: the reptilian brain (archaic formations of the brain), the Mammalia (in common with mammals) and neoencefalo (corresponding to the development recent changes in the cerebral cortex in the last 160,000 years). In the current stage is very common to see socio-emotional behavior, while remaining anchored to rigid patterns reptilian, take advantage of sophisticated network neoencefalica (the latest) to get new evolutionary strategies with the satisfaction of basic needs (predation, mating, reproduction, etc.) unchanged for millions of years.
In other words we have lost our innocence primitive hominid without winning even a point in evolution, which can be defined as "human" to make sense: a few examples of men "human" as flames dotting the bleak lonely darkness of our history and our inscrutable earthly journey.