Search results
Results From The WOW.Com Content Network
"Reptilian complex" (also known as the "R-complex", "reptilian brain" or "lizard 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 idea that comparative neuroanatomists once believed that the forebrains of reptiles and birds were dominated by ...
The neomammalian brain (neocortex) is the newest addition to the Human Brain. MacLean proposed that as animals evolved over the hundreds of millions of years, [ 1 ] in order for an increased chance of survival , higher order animals developed an increased cognitive ability, which resulted in an increase in brain size.
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 ...
Science & Tech. Shopping. Sports
Main Menu. News. News
In a bright, white auditorium on the rolling campus of a rehab center on the East Coast, I learned that addiction is a disease. The giant room was filled with addicts and alcoholics, including my ...
The status of the medulla as part of the primordial reptilian brain is confirmed by its disproportionate size in modern reptiles such as the crocodile, alligator, and monitor lizard. Additional images
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 ...