I'll poke around, I tend to remember how things work, not always good at where they came from. But I've caught up on a lot of more current research from reading the Eide Neurolearning Blog ( http://eideneurolearningblog.blogspot.com ), but don't have a specific post there to point towards.

I've seen a lot of sites talking about visual-spatial learning that don't really get it and think it is just about presentation. It is as much about system and conceptual thinking.