A Few Brain Facts
Here are a few interesting brain facts to amuse and inform
- Your brain uses 20% of your blood. About 20% of your blood
is pumped to the brain, which needs it to keep up with the heavy
metabolic demands of its neurons.
- Your brain uses 20% of your oxygen. What accounts for 2%
of your body's mass, yet uses 20% of all the oxygen you breathe?
Your brain! It needs a continuous supply of oxygen, and a 10
minute loss of oxygen can cause significant neural damage.
- The cerebellum, sometimes called the "little brain",
weighs approximately 150 grams. Found at the lower back of the
brain, it is needed to maintain posture, to walk, and to perform
any coordinated movements. It may also play a role in olfaction
- The brain has no pain. Because there are no nerves that
register pain within the brain itself, neurosurgeons can probe
the brain while a patient is conscious. They can then use feedback
from the patient to identify important regions, such as those
used for speech.
- An elephant's brain is about six times as large as a human
brain. In relation to body size, however, humans have the largest
brain of all the animals (about 2% of body weight).
- The human brain weighs an average of about 1.4 kilograms,
or a little over three pounds. A cat's brain weighs about one
- Number of neurons in the brain (average): 100 billion
- Number of neocortical neurons lost each day: 85,000
- Albert Einstein's brain was smaller than average, because
he was smaller than average.
- There are 100,000 miles of blood vessels in the brain.
- We now know for a fact that the brain continues to produce
new neurons throughout our lives, and it does so in response
to stimulation (exercise). This is referred to as brain plasticity
or neuro-plasticity, and it is one of the most encouraging of
these brain facts.