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

 

The Wild Canadian Year

Wild Canadian Year


Visit our website to watch the series online, discover extra behind-the-scenes stories and view Canada's nature scenes in 360. Visit Wild Canadian Year

From CBC Kids

The Nature of Thingies