{"id":30522,"date":"2020-06-30T22:51:49","date_gmt":"2020-06-30T22:51:49","guid":{"rendered":"https:\/\/sciencesensei.com\/?p=30522"},"modified":"2023-11-25T05:32:06","modified_gmt":"2023-11-25T10:32:06","slug":"the-human-brain-explained-so-a-5-year-old-could-understand","status":"publish","type":"post","link":"https:\/\/dev.sciencesensei.com\/the-human-brain-explained-so-a-5-year-old-could-understand\/","title":{"rendered":"The Human Brain Explained So A 5 Year Old Could Understand"},"content":{"rendered":"

It was once assumed that the human brain was nothing more than a cooling center. Seriously, this was assumed by the likes of Socrates. Most assumed the heart was the thing that explained how we thought. This is why sayings like “thinking with your heart” came to be.<\/p>\n

This is also the very reason why most early armors were concerned with the chest and less about the head. Of course, keep in mind that the torso is also a much larger target too. Later on, protecting the head became paramount in war. People have now comprehended the human brain’s true job for centuries.<\/p>\n

The real question mark for most people is, quite simply, how does it all work? Yet when this is explained a bit, more questions begin to arise. It’s a rabbit hole to travel down for sure. Why do we have this thing? Why is it that we seem to be the only truly advanced species on the planet? How did humans evolve to possess something so much more powerful than others?<\/p>\n

To answer all of these questions, it is likely that we’ll need to start from the beginning. Moreover, we’ll need to go down through history and mention all the major knowledge we gained about the brain. We’ll also need to explain how each area works, why they’re critical to our health and life overall, how they are important to us and much more.<\/p>\n

That’s right people, we’re going to do a deep dive into the human brain! We’ll go over the history of everything we know, as well as the brain itself. In fact, we’re going to explain it all so well that a 5-year-old could understand it. Now, let’s get started!<\/p>\n

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Skull and Neanderthal sculpture. Photo Credit: LegART\/Shutterstock<\/em><\/figcaption><\/figure>\n

Evolution Of Human Brain Size<\/strong><\/h2>\n

It is quite obvious by now that the human brain was not always like it is today. In fact, they have actually gotten smaller in size<\/a> overall compared to how they looked tens of thousands of years ago. We now have the literal smallest brain we’ve ever had, at least since we were able to become primates.<\/p>\n

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3D rendering of human brain anatomical model. Photo Credit: Wirestock Creators\/Shutterstock<\/em><\/figcaption><\/figure>\n

This is a pretty cool thing to learn because for so long people assumed that the bigger a brain was, the smarter a person would ideally be. Yet we now know this is not the case. In fact, here are highly intelligent people with brains that are nowhere near the size we saw in just the Neanderthal, much less those before that.<\/p>\n

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\"Hippocrates
Hippocrates AC Odyssey. Photo Credit: YouTube<\/em><\/figcaption><\/figure>\n

Hippocratic Hope<\/strong><\/h2>\n

Hippocrates, a notable ancient Greek Physician, was really one of the first to get it right. He is often called the father of Neuroscience as a result. The man was able to uncover all of his concepts over 2,500 years ago without much to go on other than testing. Of course, it was minor testing at that. Unlike others of his time, Hippocrates believed that the human brain was not a cooling system.<\/p>\n

Rather, he felt it was the seat of all thought, sensation, emotion, and cognition<\/a>. This was slowly adopted into basic thought in the medical community. This is a pretty big deal because he was able to uncover something with only a bit of expertise in the area. Keep in mind, this was before major autopsies had been done. Therefore, Hippocrates had to go off of what he noticed and could hypothesize.<\/p>\n

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\"Galen
Galen Treating Gladiator. Photo Credit: ilbusca\/Shutterstock<\/em><\/figcaption><\/figure>\n

Galen’s “Interesting” Discoveries<\/strong><\/h2>\n

Galen, a very respected physician during his time, was considered for a century to be an unquestioned medical genius. He was so influential that his books and overall work were taught in medical schools for over 1,000 years after his death!! Galen once claimed that the human brain had three ventricles. Of course, we now know there are more but he was sort of onto something here.<\/p>\n

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Neural activity travels from one point to another in the cerebral cortex. Photo Credit: Penn State University<\/em><\/figcaption><\/figure>\n

On top of all of that, Galen claimed that a ventricle was responsible for imagination, reason, and memory<\/a>. Although, Galen was also a bit close when he said that the brain was able to control activities by pushing brain fluid from the ventricles through the nerves to other organs. While he had some good ideas, some of his other concepts were, shall we say, “weird” at best.<\/p>\n

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\"Andreas
Andreas Vesalius portrayed with an arm of a cadaver he has dissected. Photo Credit: Everett Collection\/Shutterstock<\/em><\/figcaption><\/figure>\n

Along Came Andreas Vesalius<\/strong><\/h2>\n

Until Andreas Vesalius came along, no one considered questioning Galen’s ideology. Vesalius felt Galen was wrong, but it was illegal to open up a deceased body during this period of the 16th Century. We just came out of the Dark Ages. Vesalius eventually got his hands on a body and examined it. He found<\/a> that Galen never really tested a human body but, rather, worked with animals and naturally assumed humans were the same.<\/p>\n

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The 16th-century anatomist Andreas Vesalius. Photo Credit: Wikimedia Commons<\/em><\/figcaption><\/figure>\n

This includes even assuming their brains were like our own. All of this enraged Vesalius, so he made it his life’s mission to disprove Galen’s ideology. He’d get credit for this after releasing his book, of course. Even then, some overlooked his concepts until the 17th Century. Others taught his findings alongside Galen’s. His book De Humani Corporis Fabrica<\/em><\/a> (On the Fabric of the Human Body), is still notable in the medical community to this day.<\/p>\n

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\"Vesalius
Vesalius’ Brain Experiment. Photo Credit: Reddit<\/em><\/figcaption><\/figure>\n

Vesalius’ Brain-Related Discoveries<\/strong><\/h2>\n

While Vesalius took down sketches of the human brain and even wrote about how he felt things worked. This includes our understanding of the Nervous System as he pretty much wrote the literal book on nerves. All of this is still considered to be factual information to this day.<\/p>\n

Andreas found that the nerves played a vast role in the body. He defined a nerve<\/a> as being what transmitted sensation and motion, which is pretty much the case today but was a huge divert from the present time (mid-to-late 1500s). Before Vesalius, only 3 nerve units were known to be present. Today, we mostly discuss this in relation to Neurons, and the human brain has over 100 billion of those.<\/p>\n

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Human brain and nervous system. Photo Credit: Magic3D\/Shutterstock<\/em><\/figcaption><\/figure>\n

He also felt confident that the brain and nervous system overall were the centers of the mind and emotion. This connected more with Hippocrates. On top of this, he felt the nerves did not come from the heart but rather, from the brain. This was already known of but silenced when the Catholic Church adopted Aristoletelian beliefs. Today, Vesalius is known as the father of Neurophysiology due to his massive discoveries.<\/p>\n

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\"Ivan
Ivan Petrovich Pavlov Monument. Photo Credit: Irina Borsuchenko\/Shutterstock<\/em><\/figcaption><\/figure>\n

Moving Into The Current Generation<\/strong><\/h2>\n

The science behind the human brain is significant. This is from both a hard science & soft science<\/a> perspective. It seems that our generation has mostly focused on the soft science approach far more due to much of the hard science stuff already being settled.<\/p>\n

After Vesalius’ work, however, hard science research didn’t end. We’re still discovering new things about the human brain all the time. Many men and women deserve credit for what they were able to find. That said, here are a few and their discoveries.<\/p>\n

Major Figures & Their Inventions\/Discoveries:<\/strong><\/h3>\n