Levine – experience-based brain development  

It means pretty much what it sounds like. That the brain develops in a context, and the context is the experience that surrounds the brain on a variety of levels. Experience can be what happens to a cell as it’s moving into place to form connections with other cells. And it can also be a whole organism life experience that may be formed by family environment or by the broader social environment by economic class and by a variety of other considerations.