Gary,
I have this old post that discusses the possible origin of these waves. It is my suspicion that these arise in the thalamus and are injected into the cortex in L4. See the post for references and more detail:
The basic HTM theory describes region updates as synchronous, with the SDRs as a static presence during each cycle evaluation; updated whole throughout the region after each evaluation.
It is implied in all discussions for predictive dendrite segments (SDRs) that there is a “before” and “after” in regards to global states for the local region; the processing of the SDR neurons in a region could be considered as the evolution of the current region state to the next state as a coherent whole. I d…
You mention a larger model and I agree that HTM fits in this framework. I have outlined what I think that framework is here:
Considering the limbic system or cortex in isolation really misses the point. As I said earlier - you have to look at it from a system point of view to make any sense of this whole thing.
Some points to consider before I try to put it all together:
What exactly does it mean for a section of the cortex to “recognize” something?
I know that the Numenta people are putting a lot of effort to get the backward flow to be some kind of location signal so that the sense of touch can be locally combin…