The Human Brain
Three Major Systems
Reptile Brain – instinct and survival
Mammal Brain – emotion and feelings
Cerebral Cortex – thinking and learning
The human brain is the result of development of life on Earth over billions of years, from the origin of reptiles to mammals to primates and humans,
which accounts for the progressive complexity of the brain and how it now functions in the human body. The human brain is, by far, the
most complex structure known and is estimated to be able to perform about 20 million billion calculations per second.
The brain contains . . .
100 billion neurons
trillions of supporting cells
40,000 connections between the cells
1,000,000,000,000,000 (one quadrillion) connections, more than all the stars that exist in the entire Universe
The brain continues developing until it reaches about age 25 and it can . . .
replace parts of the brain bruised, damaged or injured\
retain good memories
heal painful memories
Every time you have a thought . . . your brain releases chemicals
every negative thought releases chemicals that make you feel negative
every positive thought releases chemicals that make you feel positive
you do not have to believe everything that comes to your mind because thoughts are automatic
thoughts are based on complex chemical reactions and memories so thoughts are often erroneous