Signs of successful brain surgeries go as far back as the Stone Age.
2) An adult brain weighs about 3 pounds.
3) About 75 percent of the brain is made up of water. This means that dehydration, even in small amounts, can have a negative effect on the brain functions.
4) The largest brain of any animal is that of the sperm whale. It weighs about 20 pounds.
5) The human brain will grow three times its size in the first year of life. It continues to grow until you’re about 18 years old.
6) Headaches are caused by a chemical reaction in your brain combined with the muscles and nerves of your neck and head.
7) The brain of a human contains approximately one hundred billion neurons
8) It is a myth that humans only use 10 percent of our brain. We actually use all of it. We’re even using more than 10 percent when we sleep.
9) Cholesterol is key to learning and memory. However, high cholesterol has different effects depending on your age and other factors.
10) Information runs between neurons in your brain for everything we see, think, or do. These neurons move information at different speeds. The fastest speed for information to pass between neurons is about 250 mph.
