i recently read a few interesting papers from Jacob Bellmund, a german cognitive neuroscientist. He talks a lot about “Cognitive Spaces” and the navigation properties of grid and place cells in the Hippocampus and Entorhinal Cortex. I think a few papers could be very interessting to discuss because of the similaritis between the actual Numenta theory and his research.
For example here is an interessting review summary about navigating in cognitive spaces (like reference frames at numenta)
He also has a webpage where you can read other puplications from Bellmund.
I hope someone is interested in this topic or maybe has already read about this.