Summary of los tres cerebros

00:00:00 - 00:05:00

The video discusses the evolution of the human brain, specifically the three regions that evolved from reptiles. It also covers the functions of the various parts of the brain and how they work together.

• 00:00:00 The last three million years are definitive for the evolution of the human step from primates, such as the orangutan, chimp, and gorilla, to Homo sapiens. Various fossil discoveries show this evolution from Australopithecus to Homo habilis to Homo erectus and recently to Homo sapiens, one of the first Europeans. The dental larynx, which disappeared without a clear explanation some 50,000 years ago, is one of the human cranial features that evolved from the reptilian brain and is inherited from simple vertebrates. The three brain regions of the human, frontal for olfaction, middle for vision, and posterior for balance and coordination, evolved from the reptiles' brainstem as a group of primitive neurons located at the upper end of the dorsal spine. This reptilian brain arrangement was inherited by the fish-like human cerebrum and its instinctive survival function, such as fighting or fleeing, occurred about 400 million years ago. When mammalian evolution progressed, new instincts related to sex and reproduction evolved along with them. The most important of these was the care for newborn babies, as small children arrive in the world vulnerable and with difficulty in ensuring their descendants' survival. New mammalian instincts do not replace the instincts of reptiles but increase them
• 00:05:00 The brain covers the trunk and accounts for 90% of the body's total weight. The frontal cortex is responsible for emotions and impulses, the left hemisphere is responsible for logic and operations, and the right hemisphere is responsible for will and movement. The occipital cortex is responsible for vision. The older part of the brain is the cerebellum, which acts as a center for receiving messages from the senses - the sense of smell sending signals to the higher centers in the brain, the messages from the nose passing directly to the cerebral cortex. The cerebellum is responsible for the functions that humans have since the earliest days of mammalian evolution, when the cerebral hemispheres began to evolve. The olfactory lobe is located below the cerebellum and stimulates and prepares the brain for the actions grouped together in an emotional state at moments of effort, the olfactory lobe sends messages to the heart to increase heart rate or to suspend digestion and leave blood free to go to the muscles to provide another function. The amygdala is part of the brain's limbic system and connects the cerebellum and the hipotálamo with the cerebral cortex, and is responsible for all emotional impulses. The memory emotional responses are short-term, immediate responses and long