# Thousand Brains Hangout with Jeff & Subutai

**URL:** <https://discourse.numenta.org/t/thousand-brains-hangout-with-jeff-subutai/5077>\
**Category:** Live Streaming\
**Created:** [December 17, 2018, 8:00pm UTC](https://discourse.numenta.org/t/thousand-brains-hangout-with-jeff-subutai/5077 "2018-12-17T20:00:55Z")\
**Posts on this page:** 1\
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**Author:** ![rogert](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/rogert/32/1294_2.png) [@rogert](https://discourse.numenta.org/u/rogert)\
**Post date:** [January 22, 2019, 5:30pm UTC](https://discourse.numenta.org/t/thousand-brains-hangout-with-jeff-subutai/5077/13 "2019-01-22T17:30:11Z")

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SDRs in HTM model synchronized activity of a few cells in a layer of a cortical column, where activity could be a single output spike or a brief burst†. It seems that spike transmission time in long-range connections must result in some desynchronization?  
I’m interested in whether this is seen as an issue in TBT, where long-range cross region connections seem to have a greater significance than in the traditional hierarchical model? Could temporal coding (spike bursts, produced by a single neuron or a cell assembly, in which the pattern of inter-spike intervals is significant) play a part in TBT models?

Also, the frameworks paper proposes that L5 displacement cells multiplex representations for movement vectors and object composition: would welcome more explanation/discussion of this.

† (is this a good enough summary of the neuroscience of SDRs?)

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