Is there an emotional brain? As much as we like simplicity in models of science, and the locationist view makes things easier for us to understand, research points to the answer that emotions are not localized to one specific brain region or circuit. The limbic system hypothesis was put forth by Paul MacLean in the 1950s (although some theories led up to this prior such as the Papez circuit). It divides the more deeply fundamental structures with those that are thought to have developed further on in evolution, in ‘higher’ mammals. The limbic system is one component of the triune brain theory that divides the brain up into the neocortex, mammalian brain and reptilian brain. The reptilian brain is proposed to be in charge of responses for survival such as breathing and heart rate. The reptilian brain is called so due to its structures being found also in reptiles. The limbic system is thought to have developed later in evolution and is commonly thought to be the mammalian bra...
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