# Cortex Input Cortex Output

**URL:** <https://discourse.numenta.org/t/cortex-input-cortex-output/7059>\
**Category:** General Neuroscience\
**Tags:** question\
**Created:** [January 15, 2020, 4:17am UTC](https://discourse.numenta.org/t/cortex-input-cortex-output/7059 "2020-01-15T04:17:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![PeriodicStructure](https://avatars.discourse-cdn.com/v4/letter/p/34f0e0/32.png) [@PeriodicStructure](https://discourse.numenta.org/u/PeriodicStructure)\
**Post date:** [January 15, 2020, 4:17am UTC](https://discourse.numenta.org/t/cortex-input-cortex-output/7059/1 "2020-01-15T04:17:22Z")

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In the HTM Overview (episode 0) Matt Taylor explains that there are two major inputs to the neocortex: a copy of motor commands from older parts of the brain and a copy of sensory input from our sense organs. It seems to me that there might be two major classes of output from the cortex: the actual motor commands that constitute actions and the interior sensory representation of the sensed exterior. Is there any evidence of output from the neocortex that ‘looks like’ sensory input?

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**Author:** ![rhyolight](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/rhyolight/32/3922_2.png) [@rhyolight](https://discourse.numenta.org/u/rhyolight)\
**Post date:** [January 15, 2020, 5:28am UTC](https://discourse.numenta.org/t/cortex-input-cortex-output/7059/2 "2020-01-15T05:28:22Z")

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Layer 6 CT cells project to thalamus. The [3VS](https://discourse.numenta.org/t/deep-predictive-learning-a-comprehensive-model-of-three-visual-streams/3076) paper theorizes that this deep projection represents a prediction to be compared to the same input heading toward L4 in the thalamus.

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**Author:** ![PeriodicStructure](https://avatars.discourse-cdn.com/v4/letter/p/34f0e0/32.png) [@PeriodicStructure](https://discourse.numenta.org/u/PeriodicStructure)\
**Post date:** [January 15, 2020, 12:50pm UTC](https://discourse.numenta.org/t/cortex-input-cortex-output/7059/3 "2020-01-15T12:50:57Z")

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thanks, that’s very interesting. I’ll take a look at that paper.