Generally, it refers to involvement of large parts of the brain (or the whole organ), instead of identifiable changes confined to parts of the brain. (sciencedaily.com)
We need a lot of physical contact to be emotionally healthy, and a very large part of the brain is given over to the skin, as a feeling organ. (parenting-with-love.com)
Babies who are exclusively breastfeed for 3 months have been known to develop better cognitive aftermaths because larger parts of their brains are developed, such as parts related to language, emotional function, and cognition. (lovingmomentsbras.com)