Given a particular brain, with its neurons in a particular state—these neurons are firing while those ones are quiet—one can precisely compute the extent to which this network is integrated.
The English-language words "integrated" and "integration" have multiple meanings, some of which are sufficiently vague that you can use them to make up vague statements that sound all sciency and profound but don't mean much of anything. The sentence you quoted is an example.
(And this post is an example of a mentor posting a thread-closing notice. Closed)