Tag: Reptilian brain

May 18, 2026 / Mohammed looti

EVOLUTION OF THE BRAIN

Evolution of the Brain: A Comprehensive Definition The evolution of the brain is defined as the multi-millennial, cumulative process through which the nervous systems of living organisms, particularly vertebrates and primates, have undergone structural and functional transformations to reach higher levels of complexity. Spanning hundreds of millions of years, this biological odyssey has transitioned life […]

November 26, 2025 / Mohammed looti

TRIUNE BRAIN

Introduction and Definition The Triune Brain model, a framework posited by the American doctor and neurophysiologist Paul D. MacLean in the mid-20th century, describes the human brain as having evolved sequentially in three distinct, layered structures. This view suggests that the architecture of the brain reflects three major evolutionary epochs, corresponding to the dominant vertebrate […]