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The triune brain consists of the reptilian complex (basal ganglia), the paleomammalian complex (limbic system), and the neomammalian complex , viewed each as independently conscious, and as structures sequentially added to the forebrain in the course of evolution. According to the model, the basal ganglia are in charge of primal instincts, the ...
In the 1960s, Dr. MacLean enlarged his theory to address the human brain's overall structure and divided its evolution into three parts, an idea that he termed the triune brain. In addition to identifying the limbic system, he hypothesized a supposedly more primitive brain called the R-complex, related to reptiles, which controls basic ...
The Reptilian Brain was referred to by MacLean as the ‘R Complex’ or the primitive brain. [5] This is the oldest brain in the Triune Theory and anatomically is made up of the brain stem and the cerebellum. [10] In reptiles, both the brain stem and cerebellum dominate and are the control centres for basic function.
The human brain is the central organ of the nervous system, and with the spinal cord, comprises the central nervous system. It consists of the cerebrum, the brainstem and the cerebellum. The brain controls most of the activities of the body, processing, integrating, and coordinating the information it receives from the sensory nervous system ...
File:Brain_human_normal_inferior_view.svg licensed with Cc-by-2.5 2009-10-13T16:18:05Z Beao 424x505 (209117 Bytes) Replaced right brain half with a clone of left brain half because they look excly the same in the picture. 2007-09-23T15:14:17Z Ysangkok 424x505 (417241 Bytes) removing credits
Reptiles are a diverse animal classification group of scaly, cold-blooded vertebrates that can be found in habitats all around the world. Crocodiles, snakes, turtles and lizards belong to the ...
The evolutionary history of the human brain shows primarily a gradually bigger brain relative to body size during the evolutionary path from early primates to hominins and finally to Homo sapiens. This trend that has led to the present day human brain size indicates that there has been a 2-3 factor increase in size over the past 3 million years ...
The human brain contains 86 billion neurons, with 16 billion neurons in the cerebral cortex. [ 2 ] [ 1 ] Neuron counts constitute an important source of insight on the topic of neuroscience and intelligence : the question of how the evolution of a set of components and parameters (~10 11 neurons, ~10 14 synapses) of a complex system leads to ...