The human brain
March 25, 2012 | In: Medical facts
The home of our thoughts and wishes, our secrets and our IQ, the human brain is still one of the most interesting, strange and complex things in the universe. Our brain is 60% white matter and 40%, gray matter.
The white matter is responsible with creating the network by which neurons send their signals. The grey matter is made up of neurons, which gather and transmit signals. Our brain has 100 billion neurons. Every neuron has 1000 to 10000 synapses. A synapse is a structure that permits a neuron to pass an electrical or chemical signal to another cell. During the early pregnancy, the neurons develop at a rate of 250.000 per minute, but that doesn’t mean that we’re smarter then. After birth, our brain grows 3 times its size in the first year, and it continues to grow until we reach 18.
Our pain doesn’t feel pain, because it does not have any pain receptors.
The human brain is the largest of all the creatures, consisting in 2% of the total body weight, and it’s one of the fattest, consisting in 60% fat.
Throughout our brain there are approximately 100.000 miles(160.000 km) of blood vessels. Our brain has a cerebral cortex, which is responsible with attention, memory, awareness, language and consciousness. This cerebral cortex grows in thickness as we learn to use its functions. The human brain produces neurons all its life, it its mental activity is high. Our brain develops far greater if we read loud. That is why mothers speak with their children about everything.
At birth, there are a number of senses that are already developed, such as joy, happiness, fear and shyness. Al the other more developed senses occur much later. This shows us the similarities between humans and animals. It is very important that children aren’t abused in the early childhood, because this kind of actions can inhibit brain development, or even do irreparable damage to it.
Our brain uses 20% of the oxygen in our body. The same goes with the blood, the brain using almost 20% for all the basic things. If the human brain doesn’t get blood for 8 to 10 minutes, it loses consciousness. If the oxygen doesn’t go into it for 6 minutes, it begins to die. After 10 minutes with no oxygen, the brain suffers permanent damage.
Let’s begin with fever. Next time our body has plus 2 or 3 degrees from the normal temperature, we should think about the man that survived with an outstanding 115.7 degrees.
High levels of stress are responsible with the alteration of brain cells, structure and function.
The brain has to sleep
Did you know that the lack of sleep affects our capability to create new memories? But I assure you that when you sleep, you dream. It doesn’t matter if you remember or not. Most people have an average of 4-7 dreams each night. If you want to remember your dreams, write them quickly, because after 10 minutes, 90% of it disappears. When you’re snoring, the chances are that you’re not dreaming.
People started to study the brain 4000 years ago, when the Egyptians started some form of brain surgery. Even tough, after so many years, the brain still continues to be the biggest mystery in the universe