The brain grows from the bottom-up, until top-down regulation can be acheived, according to Dr. Robert Melillo. At the same time as vertical growth is occurring, horizontal integration is happening, with the right brain having stronger growth in the first 2 years and the left brain having stronger growth in the 2nd two years.. More info? See the related blog post here: https://www.theadjustment.com/blog/chiroblog/ or check out our website here: https://www.theadjustment.com/