This is a community-created and managed reference card about HTM theory and implementation for easy lookup for common information. Please add to it if you have something interesting to add. If you see “?” and know the answer, please fill it up. Just the numbers as rule-of-thumb in 10’s : …

Oops, you’re right. It’s midnight on a Friday night and my reading comprehension has been found wanting… Time for beer. It kills the weaker brain cells first! :laughing:

Ok all, I converted @mraptor ’s first post to a wiki and moved @ddigiorg ’s content into it as well. It is now up to you to organize the content and plan how it should be structured. Use this thread to discuss the wiki, but treat the first post as the actual wiki content.

Cortical Column is equivalent to hierarchy of HTM-regions, right ?? Mini-column is equivalent to column inside HTM-region ?

Yes that’s right. Let me be explicit just in case I’m mistaken: a Cortical Column (a “macrocolumn” or “hypercolumn” in the biological neocortex) consists of many minicolumns. The HTM that we’re used to that has a Spatial Pooler and Temporal Memory is a model of layer 3 in a Cortical Column. In a …

I thought it is the other way around ! HTM-Region (SP+TM) is 2048 mini-columns and CC is hierarchy of HTM-regions.

I modified the graphic under the “Neocortex” heading. I think this is more clear. In HTM per my understanding a Cortical Column has 2048 mini-columns. The Spatial Pooler selects active minicolumns across the entire CC. Temporal Memory replicates layer 3 neurons in the biological neocortex. The …

Hey @Paul_Lamb , have you thought about updating this with more of the graphics you’ve created? You might post them here for discussion if you think they are relevant.

[image] rhyolight: have you thought about updating this with more of the graphics you’ve created? Sure, that’s probably a good way to discuss components of HTM and fact-check any assumptions. I’ll put some together to try and depict graphically where the HTM Implementation Parameters apply i…

[image] mraptor: Average number of connections : ?? Average number of dendrite segments : ? Average number of synapses per dendrite segments : ? Does somebody knows those numbers ?

Perhaps this paper could help: [image] The human brain in numbers: a linearly scaled-up primate brain The human brain has often been viewed as outstanding among mammalian brains: the most cognitively able, the largest-than-expected from body size, endowed with an overdeveloped cerebral c…

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Engineering

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