Some theorists talk specifically about regions of the brain that perform such 积分s. I've got my favorite sensory-motor 积分 site, Hagoort has a theory about phonological, semantic, and syntactic 积分 in (different portions of) Broca's area, more broadly, Damasio has been talking about "convergence zones" (aka, 积分 sites) for years.
Two thoughts come to mind. One, is there any part of the brain that isn't doing 积分, i.e., how useful is the concept? And two, if the concept does have some value, how do we identify 积分 areas?
I don't know the answer to first question and I have some concerns about the way some in the field approach the second. W.r.t. the latter, a typical approach is to look for regions that increase in activity as a function of "积分 加载". The idea is that by making 积分 harder, we will drive 积分 areas more strongly and this will cause them to pop out in our brain scans. This seems logical enough. But is it true?
1. Broca's area does AV 积分. It is less active when 积分 is easy, i.e., when A and V match than when 积分 is hard, i.e., when they mismatch 因为它 has to work harder to integrate mismatched signals.
Both possibilities seem perfectly consistent with the facts. Similar possibilities exist for other forms of 积分 making me question whether the "加载" logic is really telling us what we think it is telling us.
There is another approach to identifying 积分 zones, namely to look for areas that respond to both types of information independently but respond better when they appear together. In our example, AV 积分 zones would be those areas that respond to auditory speech or visual speech, but respond best to AV speech. I tend to like this approach a bit better.