LT,
If you inhabit more than just four dimensions then those other parts of YOU could be receiving stimulae which affects even the physical part of YOU without you necessarily being able to scientifically measure it (at this time) or physically sense it as an "external" event.
Maybe, bringing us back to the "Naturalism" topic, man is evolving to be able to interact and perceive these dimensions in a manner that has heretofore been sporadic.
it would be super cool. and as a science fiction fan, i won't say it's not possible.
still though, if this were the case, then this other dimension would still have to stimulate us biologically, and interact with the physical, as kid-A points out. and if it is interacting, then it really should not be beyond measurement. neuroscientists should have detected some very strange phenomena by now, no?
why have our five senses developed at all in the last 3 billion years? why are those five so strong? of course, it's all about survival in an object oriented world. why only five? why not 6 or 7? it's because the five aid us in survival. there is no natural selection pressure for a sensitivity to the "other", most possibly because there is no "other".
but if we are evolving to allow interaction with "other", then why have humans been going on and on about the "other" for so long? you'd think that in an object oriented world, we would not believe in any "other" or spirit beings. we should have all been agnostic as long as survival was the most important.
it is a compelling line of thought, however, i must say. it sounds a bit elitist (now religious people have evolved further than non-religious people), but still fun.