# Numenta Research Meeting - June 1, 2020

**URL:** <https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622>\
**Category:** Current Research\
**Created:** [June 3, 2020, 6:19am UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622 "2020-06-03T06:19:15Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![Bitking](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/bitking/32/3099_2.png) [@Bitking](https://discourse.numenta.org/u/Bitking)\
**Post date:** [June 3, 2020, 6:19am UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/1 "2020-06-03T06:19:15Z")

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Jeff Hawkins brainstorms how sensorimotor models might be built up from purely sensory data, how this might fit into a cortical column, and the importance of magnocellular and parvocellular cells.

[![](https://img.youtube.com/vi/uQpX-MnAJqU/maxresdefault.jpg "Sensorimotor Models, Layers and Magno/Parvo Cells (Part One) - June 1, 2020") ](https://www.youtube.com/watch?v=uQpX-MnAJqU)

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**Author:** ![adam](https://avatars.discourse-cdn.com/v4/letter/a/4af34b/32.png) [@adam](https://discourse.numenta.org/u/adam)\
**Post date:** [June 3, 2020, 7:32pm UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/2 "2020-06-03T19:32:13Z")

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Here is the Link to the paper mentioned at the end: [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6672484/pdf/zns3211.pdf](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6672484/pdf/zns3211.pdf)

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**Author:** ![Bitking](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/bitking/32/3099_2.png) [@Bitking](https://discourse.numenta.org/u/Bitking)\
**Post date:** [June 3, 2020, 11:21pm UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/3 "2020-06-03T23:21:03Z")

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Hmm, Moire patterns?  
Where have I seen that proposed before?

> [@How to generate place fields in grid cells](https://discourse.numenta.org/t/how-to-generate-place-fields-in-grid-cells/4456/6):
>
> This shows a graphic example of how my proposed system works. There is something at work to form the cluster of features that we can identify as a Moser grid cell being active when certain inputs are present. I think that in time Numenta will show how the TBT builds up to doing this. I think that the Calvin tiles method (hex-grid coding) shows great promise but until I get demo code running to show this in action it is just another pretty theory. BTW: to clarify a relationship - (mini-columns…

Or maybe here?

> [@HTM Hackers' Hangout - Mar 1, 2019](https://discourse.numenta.org/t/htm-hackers-hangout-mar-1-2019/5516/11):
>
> One of the things that jump out to me going through it is that the Numenta simulation does lateral connections to ALL cell bodies. You may recall that I consider the length of the lateral connection to be an important consideration as it clearly is in biology. Topology matters. This leads to the hex-grid signaling in my models. Please consider the implications of hex-grid coding and how this can build to the observed properties of Moser Grid cell. What do I mean by building to Moser grids? Con…

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**Author:** ![fcred](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/fcred/32/433_2.png) [@fcred](https://discourse.numenta.org/u/fcred)\
**Post date:** [June 5, 2020, 9:18am UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/4 "2020-06-05T09:18:33Z")

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> [@Bitking](#):
>
> Hmm, Moire patterns?  
> Where have I seen that proposed before?

Maybe [Retinal origin of orientation maps in visual cortex](https://www.nature.com/articles/nn.2824)?

That actually would give a consistent model for both direction sensitive and grid cells.

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**Author:** ![thanh-binh.to](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/thanh-binh.to/32/1793_2.png) [@thanh-binh.to](https://discourse.numenta.org/u/thanh-binh.to)\
**Post date:** [June 5, 2020, 3:01pm UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/5 "2020-06-05T15:01:52Z")

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I find the Moire inteference of two slightly different gride cells is very interesting. But about Theta grid, this paper suggests a very complex idea.  
I believe we can maintain the theta frequency constant simply by using rotational scaling rule. It likes the phase changing, and does not need to change grid spacing.

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**Author:** ![Bitking](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/bitking/32/3099_2.png) [@Bitking](https://discourse.numenta.org/u/Bitking)\
**Post date:** [June 5, 2020, 5:05pm UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/6 "2020-06-05T17:05:34Z")

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Grid spacing and phasing and orientation are all variable.  
There is much experimental evidence to support this.

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**Author:** ![thanh-binh.to](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/thanh-binh.to/32/1793_2.png) [@thanh-binh.to](https://discourse.numenta.org/u/thanh-binh.to)\
**Post date:** [June 7, 2020, 12:41pm UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/7 "2020-06-07T12:41:31Z")

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@Bitking yes I see! I want to understand a little more about how ganglion cells (GC) connect to visual cortex.  
In my current experiment, GC cells are designed as hexagonal grid. Parvocellular and Magnocellular provide On/Off cells, where on/off grid cells will have parameters for making moire inference effects in parvo and magno!  
Normally, Moire inference is happened by any motion of objects or Animals motion!  
In retina, motion is detected by magno!  
That is why I do not understand how information from magno cellular will be used for creating moire effects?  
Any idea?

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**Author:** ![thanh-binh.to](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/thanh-binh.to/32/1793_2.png) [@thanh-binh.to](https://discourse.numenta.org/u/thanh-binh.to)\
**Post date:** [June 7, 2020, 12:50pm UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/8 "2020-06-07T12:50:10Z")

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@jhawkins could you please explain me how big is The ratio between small And large Field of view For magno connected to L4 and L2?  
Is it biological plausible that magno has two different field of view? Thanks

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**Author:** ![Qubitza](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/qubitza/32/5144_2.png) [@Qubitza](https://discourse.numenta.org/u/Qubitza)\
**Post date:** [June 8, 2020, 10:58am UTC](https://discourse.numenta.org/t/numenta-research-meeting-june-1-2020/7622/9 "2020-06-08T10:58:41Z")

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The mentioned observations remember me of sitting in a standing train while seeing another train outside the window starting to move. At first, I think the train I’m sitting in starts to move (as all of the visible world outside moves) until I recognize that I don’t feel any acceleration.