Yep, it is, and "functional" means undirected in this context, as contrasted w/ "effective" or directed. These graphs are often defined by stats like Granger c

Yep, it is, and "functional" means undirected in this context, as contrasted w/ "effective" or directed. These graphs are often defined by stats like Granger causality as well as some partition of the brain. There's a Prof. named Sporns who has a lot to say about this.