***The Tri-une Brain! Reptilian complex Ritual displays! The reptilian complex,also known as the R-complexor reptilian brain was the name MacLean gave to the basal ganglia,structures derived from the floor of the forebrain during development. The term derives from the fact that comparative neuroanatomists once believed that the forebrains of reptiles and birds were dominated by these structures. MacLean proposed that the reptilian complexwas responsible for species-typical instinctual behaviors involved in aggression,dominance,territoriality,and ritual displays. Paleomammalian complex The paleomammalian brain consists of the septum,amygdalae,hypothalamus, hippocampal complex,and cingulate cortex. MacLean first introduced the term limbic system to refer to this set of interconnected brain structures in a paper in 1952. MacLeans recognition of the limbic system as a major functional system in the brain was not widely accepted among neuroscientists,and is generally regarded as his most important contribution to the field. MacLean maintained that the structures of the limbic system arose early in mammalian evolution (hence paleomammalian) and were responsible for the motivation and emotion involved in feeding, reproductive behavior,and parental behavior. Neomammalian complex The neomammalian complexconsists of the cerebral neocortex,a structure found uniquely in higher mammals, specifically humans. MacLean regarded its addition as the most recent step in the evolution of the mammalian brain, conferring the ability for language, abstraction,planning,and perception. *Perhaps this is what Born into Sin, really refers too!
Posted on: Mon, 07 Jul 2014 14:41:03 +0000
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