Throughout its evolution, the human brain has acquired three components that progressively appeared and became superposed, just like in an archeological site : the oldest, located underneath and to the back; the next one, resting on an intermediate position and the most recent, situated on top and to the front. They are , respectively : 1 - The archipallium or primitive (reptilian) brain, comprising the structures of the brain stem - medulla, pons, cerebellum, mesencephalon, the oldest basal nuclei …showed first 75 words of 699 total…

…showed last 75 words of 699 total…superior mammals arrived on the Earth, the third cerebral unit was finally developed : the neopallium or rational brain, a highly! complex net of neural cells capable of producing a symbolic language, thus enabling man to exercise skillful intellectual tasks such as reading, writing and performing mathematical calculations. The neopallium is the great generator of ideas or, as expressed by Paul MacLean, "it is the mother of invention and the father of abstractive thought". ------------------------------------------------------------------------ **Bibliography**