A child’s brain begins developing in utero and the development of the left and right hemispheres is said to be complete at around 8 years of age in normal, healthy children. At this point the hemispheres are considered integrated and a child should be able to undertake activities with balance between the two.
From birth, up until around 2 years of age a child’s brain development is focused on the right hemisphere before shifting over to the development of the left hemisphere where it cycles through each two years up until approximately 8 years of age.
The early developing brain is particularly vulnerable to environmental influences such as the age and health of the child’s parents, diet of both the parents and child, stress, pollutants and toxins, birth trauma and complications, early life trauma and/or abuse (this can result in social, emotional and learning difficulties later on). It is considered that these factors are the main reason why right hemisphere deficiencies are more common than left hemisphere deficiencies.