In this part, the brief history of humanbeing is displayed. The process of evolution:
- Sponge(600 Million BC): Data is just like saved in
- Jellyfish(580 Million BC): The first animal has
nerves netto save data from environment. Note that nerves net not only exist in its head but also in the whole body.
- Flatworm(550 Million BC) and Frog(265 Million BC): The flatworm has nervous system in charge of everything.
- Rodent(225 Million BC) and Tree mammal(80 Million BC): More complex animals.
- Hominid(4 Million BC): The early version of neocortex. Hominid could think(complex thoughts, reason through decisions, long-term plans). When language had appeared, knowledges are saved in an intricate system(neural net). Homimid already has enough knowledge from their ancestors.
- Computer Colossus(1990s): Computer network that can not learning to think.
Three membranes around brain: dura mater, arachnoid mater, pia mater.
Looking into brain, there are three parts: neomammalian, paleomammalian, reptilian.
- The Reptilian Brain(爬行脑): the brain stem
- The medulla[mi’dula] oblongata[abon’gata] (延髓): control involuntary things like heart rate, breathing, and blood pressure.
- The pons(脑桥): generate actions about the little things like bladder control, facial expressions.
- The mid brain(中脑): eyes moving.
- The cerebellum(小脑): Stay balanced.
- The Paleo-Mammalian Brain(古哺乳脑): the limbic system(边缘脑)
- The amygdala(杏仁核): deal with anxiety, fear, happy feeling.
- The hippocampus(海马体): a board for memory to direction.
- The thalamus(丘脑): sensory middleman that receives information from your sensory organ and sends them to your cortex for processing.
- The Neo-Mammalian Brain(新哺乳脑): The Cortex(皮质)
- The frontal lobe(前叶): Handle with reasoning, planning, executive function. And the adult in your head call prefrontal cortex(前额皮质).
- The parietal lobe(顶叶): Controls sense of touch.
- The temporal lobe(额叶): where your memory lives
- The occipital lobe(枕叶): entirely dedicated to vision.
Inspiration from neural nets:
Neuroplasticity: Neurons’ ability to alter themselves chemically, structurally, and even functionally, allow your brain’s neural network to optimize itself to the external world. Neuroplasticity makes sure that human can grow and change and learn new things throughout their whole lives.