In modern society, there is various kind of stress. The brain treats stress as a threat, and tries to control it. To control a stress, the human brain should be able to control the reptilian brain and the mammalian brain. We humankind, however, are vulnerable to the emotional, physical threats. The sophisticated brainis easily suppressed by the instinctive brain. This progress leads the human to feel depressed, anxious and anger, because it cannot withstand the stress situation.
Then how can we develop the sophisticated brain, the human brain? The development of the human brain is highly activated in childhood. Surprisingly, 90 % of development is made up for 5 years after birth. The experience and the communication with parents directly affect a child’s brain and set a way the direction of the development of brain. For example, if the parents are violent, the brain develops defensive way. This leads to overprotective, sensitive, and offensive behavior. In this case, the reptilian and mammalian brain are more developed than the human brain, so a child cannot endure even tiny stress situations. On the other hand, if the kid has grown with love, the brain controls the anger, and develops attention. Thus it can deal with the stress situation effectively. .
– Margot Sunderland. (2008). The science of parenting. DK ADULT,