# “Prediction” from the first principles

**URL:** <https://discourse.numenta.org/t/prediction-from-the-first-principles/4307>\
**Category:** Lounge\
**Created:** [August 5, 2018, 10:46pm UTC](https://discourse.numenta.org/t/prediction-from-the-first-principles/4307 "2018-08-05T22:46:39Z")\
**Posts on this page:** 1\
**Showing post:** 68

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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:** [August 12, 2018, 1:10am UTC](https://discourse.numenta.org/t/prediction-from-the-first-principles/4307/68 "2018-08-12T01:10:46Z")

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> [@bkaz](#):
>
> I don’t know much about mechanics of grid cells, but actual navigation is probably guided by interaction of multiple mapping mechanisms: allocentric grid cells in hippocampus, place cells in EC, egocentric map in dorsal “where” stream, Numenta-proposed grid cells in L5 pretty much all across the cortex, etc.  
> So, it’s pretty hard to model and test it terms of ultimate behaviour.

At a lower mechanical level you may want to start here:

> [@HTM Mini-Columns into Hexagonal Grids!](https://discourse.numenta.org/t/htm-columns-into-hexagonal-grids/3567):
>
> Or at least some wild conjectures to provoke thought! This post assumes that you are familiar with basic HTM theory and are conversant with the concepts of SDRs and HTM minicolumns. May I be so bold: First - let’s be clear what I am and am not talking about. This is about cells that work by forming regular hexagonal grid structures and are not necessarily the same thing as the “grid cells” that are coding some spatial aspect of the surrounding environment. These grid-fo…

This does NOT address the navigation aspect - only the cell type itself.

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