Amazing Brain Facts

Let's learn a little more about the most sophisticated computer in the world found inside our heads.
Experts agree that there is more we don’t know about the brain than we currently know. Brain represents only 2% of weight yet consumes 20% of body’s energy production. Babies have big heads to hold rapidly growing brains. A 2-year-old’s brain is 80% of the adult size. 60% of the brain is fat and 25% of the total amount of cholesterol in your body resides in your brain. Men’s brains are generally 10% bigger than women’s brains. Women have more grey matter and a larger hippocampus, structure involved in emotional processing than men. Our brains are getting smaller. They are the size of a tennis ball smaller than they were 10,000 – 20,000 years ago. We are not getting smarter. Our IQ’s have dropper over 13 points since the Victorian era. Size doesn’t matter. Einstein’s brain was 1.2 kg – 10% smaller than average. You brain contains 100 billion neurons, about 16 times the number of people on earth. Each of them links to as many as 10,000 other neurons = massive parallel processing. The neocortex (part of the brain involved with language and consciousness) accounts for 76% of the mass of the brain. It’s the most recently evolved and gives us unique mental capabilities. Your brain consumes about 20 watts of power – enough to illuminate a very dim light bulb. Your brain keeps developing until your late 40’s. 95% of your decisions take part in the subconscious mind. You have a ‘second brain’ in your gut that contains 100,000 neurons – called the enteric nervous system. Gut bacteria make over 30 neurotransmitters including serotonin and the ENS helps regulate them.

For more watch: My Brain Made Me Do It


Available on CBC Gem

My Brain Made Me Do It

Nature of Things