Journal
NEUROSCIENCE RESEARCH
Volume 111, Issue -, Pages 13-24Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neures.2016.04.007
Keywords
Psychiatric disorder; Monoamine; Social hierarchy; Maternal care; Epigenetic; Neurodevelopment; Homophily; Symbiosis
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Psychotic and mood disorders are brain dysfunctions that are caused by gene environment interactions. Although these disorders are disadvantageous and involve behavioral phenotypes that decrease the reproductive success of afflicted individuals in the modern human society, the prevalence of these disorders have remained constant in the population. Here, we propose several biological mechanisms by which the genes associated with psychotic and mood disorders could be selected for in specific environmental conditions that provide evolutionary bases for explanations of when, why, and where these disorders emerged and have been maintained in humans. We discuss the evolutionary origins of psychotic and mood disorders with specific focuses on the roles of dopamine and serotonin in the conditions of social competitiveness/hierarchy and maternal care and other potential mechanisms, such as social network homophily and symbiosis. (C) 2016 Elsevier Ireland Ltd and Japan Neuroscience Society. All rights reserved.
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