The Human Brain, one of the most complex organs in the human body and it is the organ that makes us human. The brain gives us the capacity to have thoughts and learn different aspects of life. The human brain is also responsible for each person’s personality, movements, memories and how each of us sees the world through our eyes. The human brain is what differentiates us from each other. The brain comes in all sizes depending on humans and animals. According to a research, the average human uses only 30% of their brain’s capacity.
Of all objects in the world, the human brain is one of the most complex systems, it is referred to as a Milky Way by many scientists, because the human brain contains millions of neurons in it, just as a Milky Way contains stars in it. Just like that, even after so many advances in the study and research on the human brain, there are still aspects that have no explanation and have not been discovered yet.
The human brain is the central command centre of a human body and control the nervous system. It receives input and then sends output to different parts of the body including your muscles. The way we move, think, sense and touch, all these are worked by a jellylike mass of fat and protein, known as the human brain. The brains neurons make up the “Gray-matter” of the brain, and the electrochemical signals emitted by these neurons that are communicated via a network of millions of fibers called dendrites and axons are the “white-part” of the brain. The stem of the brain, which is at the base , controls reflexes and basic functions such as the heart rate, blood pressure and breathing.
It also sends signals to the brain, when the human body starts to feel drowsy or sleepy. The human brain is probably the most sensitive organ and is very delicate, thus it requires maximum protection that is available. That is the reason, it is compulsory to wear a helmet while riding a bike, so that in case of any mishap, the head or brain does not get affected in any way. The human brain is surrounded by a skull and 3 tough membranes called meninges. This acts as a cushion to the brain and keeps it safe. The brain is one of the most complex systems in the world.
Here is a list of the top 10 things we must know about the human brain
10. No Pain Receptors in the Brain
Even though our brain can detect pain in any part of our body, we cannot feel someone poking on our brain tissue, which is why brain surgery can be done while the patient is awake.
9. Women and Men Brains
It is a very popular belief that men and women’s brain are just different. In the way they think, they talk and make social decisions. Though, it is true that the male and female hormones affect the development of the human brain, no study shows that there is effect of gender on the behavior of the brain.
8. The Brain is Ever-Changing
It was once said, that once a human being hits puberty and enters adulthood, the ability of the human brain to form new neural connections stops and the brain stays the same for the rest of their lives. Later on, after advanced research on a patient that suffered a stroke, it was found out that this was false and that the human brain adapted to the damage on the nerves. This led to further study and hence it was found out that the brain does form new neurons even when a person enters adulthood.
7. Even at Teenage, Human Brain aren’t Fully Formed
According to many reports and research, the brain isn’t fully formed until a person reaches the 20 year old mark. As a person grows, the frontal lobes of the brain start developing, these parts are known for the seat of judgment and decision making.
According to a study conducted in 2005, the part of the human brain which deals with multi-tasking and working efficiently, does not fully develop till the age of 16 or 17. Until a teenager is 20 years old, their brain cannot function to its fullest capability.
6. The Brain is a “Tube”
When a child is born, the foundation of the brain is set. A set of Embryonic cells also referred to as Neural Plate transforms itself into a neural tube, almost 3 week after birth. This neural tube is the future human brain and will grow to become the central nervous system. After the first trimester, the tube grows and starts to come into shape.
During the second trimester, neurons are formed. After approximately 24 weeks, the human brains starts to develop wrinkles and grooves on the smooth surface of the brain. After 26 weeks, the brain starts to develop its true shape.
5. Brain is a Unique System
Like any security guard at a club, a group of cells inside the blood system of the human brain called the blood-brain barrier, lets only a number of molecules through into the nervous system. The human brain is connected with capillaries that feed the brain and are lined with tightly bound cells, whose function is to keep out the larger molecules.
Only the special nutrients that the brain really requires are pushed through. The blood-brain barrier is used to protect the brain but it can keep out lifesaving medications and if physicians try and open them up, the brain can be vulnerable to infection.
4. Not all Brain Cells are Neurons
A rumor that is patently false and has been around for a long time that we use just 10% of our brain is not true, but we do know this that the millions of neurons present in the brain just make up 10% of our brain cells. The 90% left is known as glia. Previously, neuroscientists used to think that the glia is just some simple sticky stuff that holds the neurons together.
As research became strong, it was found out that this silent majority isn’t that simple after all, it was studied that these cells provide immune protection and encourages the growth of Synapses, which are the connections between neurons.
3. Wrinkles Make us Smarter
This might disturb some beauty conscious people out there, but is said that wrinkles make a human brain smarter. Not just any wrinkles, wrinkles on the surface of the human brain, precisely. The human brain has a very different structure, it is covered with deep fissures and small grooves which are known as sulci, and there are ridges also formed known as gyri.
This surface contains billions of neurons and nerve cells, which are used to transport signals. It is said that because of such a surface, which has ridges and folds, the human brain allows more surface area and thus allows more information to be and processing power to be stored. According to research, it is said that animals such as Dolphins have even more brain wrinkles than the average human.
2. Our Brains Burn through Energy
Scientists say that the modern day human brain is an energy hog. Even though the brain takes about only 2% of our body weight, it consumes about 20% percent of the oxygen that is present in our blood and also uses 25% of the glucose present in it, now this might not sound much, but when scientifically calculated it is quite a lot. Many scientists today credit diet as what fuels our brains and allows them to grow.
Researchers say, that the reasons that humans 5000 years ago had larger brains, might be because they ate so much meat. There is still no thumb rule on why and how the brain changes size, but it is said that hypotheses such as climate change, demands of ecology and social competition might just be some of the reasons.
1. The Weight of the Human Brain
The average adult male human brain weighs approximately 3 pounds (1.3 – 1.4 Kilograms) and women average around 2.6 pounds. A bigger brain does not necessarily mean higher intelligence or a higher IQ level. Albert Einstein’s brain only weighed 2.7 pounds, for that matter. Scientists and neurosurgeons around the world relate the texture of the human brain to that of toothpaste, as the toothpaste doesn’t spread or move to our fingers.
According to research and many reports, it was found that almost 5000 years ago, the humans had brains that were even larger in size. Thus, some of the researches and scientists concluded that the size of the brain is decreasing due to many different reasons. This could be due to our diet. This does not mean in any way that humans 5000 years ago, were smarter than today’s humans, as there is connection between intellect and brain size.