Numenta Research - Hybrid Model of Grid Cells (OI / CAN) Part 1 - Jan 8, 2020

Florian's ideas after reading the following paper:

A Hybrid Oscillatory Interference/Continuous Attractor Network Model of Grid Cell Firing
Daniel Bush and Neil Burgess

Grid cells in the rodent medial entorhinal cortex exhibit remarkably regular spatial firing patterns that tessellate all environments visited by the animal. Two theoretical mechanisms that could generate this spatially periodic activity pattern have been proposed: oscillatory interference and continuous attractor dynamics. Although a variety of evidence has been cited in support of each, some aspects of the two mechanisms are complementary, suggesting that a combined model may best account for experimental data. The oscillatory interference model proposes that the grid pattern is formed from linear interference patterns or “periodic bands” in which velocity-controlled oscillators integrate self-motion to code displacement along preferred directions. However, it also allows the use of symmetric recurrent connectivity between grid cells to provide relative stability and continuous attractor dynamics. Here, we present simulations of this type of hybrid model, demonstrate that it generates intracellular membrane potential profiles that closely match those observed in vivo, addresses several criticisms aimed at pure oscillatory interference and continuous attractor models, and provides testable predictions for future empirical studies.

[Stwinky]

Yes!!! Im researching grid cell applications and you guys have been a huge help with these bad boys!

[MartinDxt]

so interesting hopefully i'll implement those systems one day

[Michael-ills]

strange. in V.Custirdis book 2015 already was this article. 2020 and still questions
maybe there are 3 perspectives of the same process - OI / CAN / plasticity learning. All 3 are interdependent. difference in phase causes LTP/LTD learning; attractor states cause learning; and attractor states caused by difference in phase

[Nikihound]

You guys are really rocking! Wonderful topic and very well explained by Florian and discussed in this group. I am still a beginner in the area of brain oscilations. I am currently reading the book: "Cycles in mind: How brain rhythms control perception and action" by Mike X. Cohen. It is a great book for beginners like me. I highly recommend reading it and perhaps some of you may find some further insights. The topic of "entrainment" is very fascinating and highly shapes and influences our awareness. I think this temporal dimension surely plays a key role in the HTM models as well. Thanks for sharing your great work and sessions. Your follower/contributor, Joe Perez PS: Herzlichen Glückwünsch für die tolle Arbeit zu Florian

[DHorse]

54:45 The one on the left is better.
Why?
Just look at the aesthetic beauty. Are you blind?

[DHorse]

I am finding complaints about you guys online. It seems you have not solved the entire brain yet.
Hurry up okay?