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The Evolutionary Theory of Depression

Piotr Gałecki, Monika Talarowska

(Department of Adult Psychiatry, Medical University of Łódź, Łódź, Poland)

Med Sci Monit 2017; 23:2267-2274

DOI: 10.12659/MSM.901240


ABSTRACT: The evolutionary success of Homo sapiens is attributed to the following two factors: the upright body posture (which freed our hands and allowed unconstrained operation of various objects) and intensive development of the frontal lobes, mainly the Broca area of the brain. Underlining the uniqueness of the human brain, we often forget about the fact that the frontal lobes – the most developed part of the brain – are at the same time our greatest weakness, exposed to the action of damaging factors in our evolving environment. Is depression the cost of evolution?

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