Have you ever wondered how you react so quickly to any stimuli, and why your finger hurts as soon as you pinch it? It's because of the incredibly high speed of nerve impulses traveling from all parts of the body to the brain and back again. They provide a reaction and travel at the speed of an expensive sports car.

Scientists have not agreed on the memory capacity of the human brain, but it holds somewhere between 1,000 and 3,000 terabytes of information. For example, Britain's National Archives, with its 900 years of history, holds only 70 terabytes, so take a look at your brain's reserves! The brain takes up just 2% of body weight, but consumes more oxygen than any other organ - so it is dramatically affected by a lack of oxygen.

Also, the human brain consumes 1/10th of all energy - 5 times more than any other organ. Add the cost of maintaining the spinal cord and peripheral system and we get: about 15% of the body's energy at rest is used to keep the nervous system active. According to the most modest estimates, the energy expenditure of the brain alone in the active state increases more than 2 times.

More Info: www.nm.org