Facts About Brain

Brain Facts


  • There are approximately 100 billion neurons in the human brain.
  • The average human brain weighs about 3pounds (1.4 kilograms).
  • The heaviest human brain ever recorded weighed 5 lb., 1.1 oz (2.3 kg).
  • The Human Brain is composed of around 100 Billion Neurons & around 1 Trillion Cells
  • We have more brain cells as a new a new born baby than we will ever have in our lives.
  • A brain processes more than 50,000 thoughts every single day.
  • Brain keeps developing until the 40’s!!!
  • When awake, the brain produces enough energy to power a small light bulb.


  • Forgetting is good for the brain. Deleting UNNECESSARY INFORMATION helps the nervous system retain its plasticity.
  • The Greek philosopher Aristotle believed that the heart, not the brain, was the seat of mental processes.
  • Information travels in the nerves at speeds up to 268 miles per hour (429 kilometers/hour).
  • Percentage of total cerebral cortex volume (human): frontal lobe = 41%; temporal lobe = 22%; parietal lobe = 19%; occipital lobe = 18%.


  • Bicycle helmets reduce the risk for head injury by as much as 85% and reduce the risk for brain injury by as much as 88%.
  • People can distinguish between 3,000 and 10,000 different smells!!!
  • A 12 oz. can of Coca Cola has 46 mg of caffeine, a central nervous system stimulant. A cup of coffee has 60-150 mg of caffeine.
  • The human cerebral cortex has an area of about 2.5 square feet, is interconnected by over 100,000 kilometers of axons and receives 300 trillion synapses.
  • The human hypothalamus weighs about 4 grams. This is the part of the brain which is responsible for fevers in our body.


  • Written about 1,700 B.C., the Edwin Smith surgical papyrus contains the first recorded use of the word “brain.”
  • The brain of a goldfish makes up 0.3% of its total body weight. An adult human brain is about 2% of total body weight.
  • The cerebellum is only 10% of the entire volume of the brain, but contains more than half of all of the neurons in the brain.
  • When children are six years old, they can understand approximately 13,000 words; high school graduates know at least 60,000 words.
  • The average intelligence quotient (IQ) score is 100. About 68% of the population has IQ scores between 85 and 115.