# 2022/03 - Scale Invariance in the Brain

**URL:** https://forum.thousandbrains.org/t/2022-03-scale-invariance-in-the-brain/362
**Category:** Video Discussions
**Tags:** review-video
**Created:** [January 6, 2025, 11:55pm UTC](https://forum.thousandbrains.org/t/2022-03-scale-invariance-in-the-brain/362 "2025-01-06T23:55:22Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![brainwaves](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.thousandbrains.org/brainwaves/32/3_2.png) [@brainwaves](https://forum.thousandbrains.org/u/brainwaves)
#### Post date: [January 6, 2025, 11:55pm UTC](https://forum.thousandbrains.org/t/2022-03-scale-invariance-in-the-brain/362/1 "2025-01-06T23:55:22Z")

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Jeff presents an idea of how grid cells and theta cycles in the brain help us quickly and adjust our sense of scale when observing objects at different sizes. He suggests that phase shifts in theta oscillations provide the key information needed for this dynamic scale calibration.

[![](https://canada1.discourse-cdn.com/flex034/uploads/thousandbrains/original/1X/2761cf80cfa7a23429182b33e823045a85763791.jpeg "2022/03 - Scale Invariance in the Brain") ](https://www.youtube.com/watch?v=gt_M7z8UkiM)

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### Author: ![HumbleTraveller](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.thousandbrains.org/humbletraveller/32/97_2.png) [@HumbleTraveller](https://forum.thousandbrains.org/u/HumbleTraveller)
#### Post date: [January 7, 2025, 1:48am UTC](https://forum.thousandbrains.org/t/2022-03-scale-invariance-in-the-brain/362/2 "2025-01-07T01:48:36Z")

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Nice!

I still need to give this a watch, but using theta oscillations in this manor somewhat reminds me of the time-encoding mechanisms found in medial-septum hippocampal interactions.

There’s some strong evidence to suggest that “movement” induces the medial septum to excite pace-maker neurons in CA3 of the hippocampal complex, and that this coordinated spiking behavior oscillates to the rhythm of a Theta wave. This theta wave can then be used to encode neural activity in a time-wise fashion. Artem Kirsanov has an _excellent_ video going over the mechanics [here](https://www.youtube.com/watch?v=5CxSoFK5tOQ)

Way back when, I actually tried to put together a framework on how this encoding process might work to coordinate information stores spread across cortical space. Some of the details here are likely off (I’m just self-taught), but who knows, maybe it can still inspire some LM-specific ideas for long-term, collective memory-storage? If not, then please just ignore 😛

 ![](https://canada1.discourse-cdn.com/flex034/uploads/thousandbrains/original/1X/b27d04741e3458f00da5817a3d65621053af4eee.jpeg)