
1) Obsolete scientific theory
Found on
https://www.crosswordclues.com/clue/triune-brain

The triune brain is a model of the evolution of the vertebrate forebrain and behavior were proposed by the American physician and neuroscientist Paul D. MacLean. MacLean originally formulated his model in the 1960s and propounded it at length in his 1990 book The Triune Brain in Evolution. The triune brain consists of the reptilian complex, the pa...
Found on
http://en.wikipedia.org/wiki/Triune_brain
No exact match found.