Executive Function Computational Cognitive Neuroscience Randall O’Reilly.
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Transcript of Executive Function Computational Cognitive Neuroscience Randall O’Reilly.
![Page 1: Executive Function Computational Cognitive Neuroscience Randall O’Reilly.](https://reader036.fdocuments.in/reader036/viewer/2022062408/56649f2a5503460f94c43cee/html5/thumbnails/1.jpg)
Executive Function
Computational Cognitive Neuroscience
Randall O’Reilly
![Page 2: Executive Function Computational Cognitive Neuroscience Randall O’Reilly.](https://reader036.fdocuments.in/reader036/viewer/2022062408/56649f2a5503460f94c43cee/html5/thumbnails/2.jpg)
Who is in Charge of your Brain??
Prefrontal Cortex?Integrates:• Cognitive Control• Planning• Motivation• Reward processing• Decision making
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Key Idea: Top-Down Biasing
PFC active maintenance provides top-down biasing of posterior-cortical processing
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The Homunculus Problem
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It Takes a Network..
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PFC Does Active Maintenance
![Page 7: Executive Function Computational Cognitive Neuroscience Randall O’Reilly.](https://reader036.fdocuments.in/reader036/viewer/2022062408/56649f2a5503460f94c43cee/html5/thumbnails/7.jpg)
Active Maintenance Can Do it All
Cognitive Control Maintained activity drives top-down biasing
Planning Think about things that are not there (future)
Motivation Maintain goals
Reward processing Maintain possible outcomes
Decision making Maintain alternatives
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The Need for Robust Maintenance
"Every sound has to be an earthquake or tidal wave that topples governments and changes national boundaries and mutates whole species so they suddenly drift off the planet, across galaxies, only to return, years later, when nobody wants to know them cause their credit rating's bad or because they can't do the Mashed Potatoes.” - MFU by HC, 1998
Subjective experience of PFC lesion: dreaming!
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Stroop Task: Top Down Biasing
RED
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Stroop Task: Top Down Biasing
GREEN
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Stroop Task: Top Down Biasing
RED
![Page 12: Executive Function Computational Cognitive Neuroscience Randall O’Reilly.](https://reader036.fdocuments.in/reader036/viewer/2022062408/56649f2a5503460f94c43cee/html5/thumbnails/12.jpg)
Stroop Task: Top Down Biasing
GREEN
![Page 13: Executive Function Computational Cognitive Neuroscience Randall O’Reilly.](https://reader036.fdocuments.in/reader036/viewer/2022062408/56649f2a5503460f94c43cee/html5/thumbnails/13.jpg)
Asymmetric Conflict
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Robust Active Maintenance
In Stroop model, we just clamp PFC units on.. What makes them “clamped” in the real brain? BG!
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Motor Gating => Cognitive Gating
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Dynamic, Adaptive Gating (BG)
Toggles PFC bistable statesResembles transistor logic gate!
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PBWM System
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Getting Loopy / Higher..
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Biological Basis of PBWM
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Executive Function
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WHIP Model