This paper tackles a major neuroeconomic problem: during deliberation, as we consider each option in turn, the brain needs to prevent premature selection of appealing options. This is not as trivial as it might seem!
-
-
Prikaži ovu nit
-
The standard solution is “thresholding” but this solution is problematic in noisy environments (like the brain), inefficiently uses the available dynamic range, and is NOT how the motor system does it.https://www.sciencedirect.com/science/article/pii/S0896627316301234 …
Prikaži ovu nit -
Imagine you+spouse want to discuss what Christmas present to buy a 4-year-old with who is eavesdropping. Whispering is bad because it risks the child will overhear and risky your partner won’t. You need to use an output-orthogonal code (e.g. spelling) for the deliberation phase.
Prikaži ovu nit -
Evidence supports this in the motor system: the brain uses subspace orthogonalization, i.e. sequestration of deliberative / preparatory activity to output-null subspaces, followed by reconfiguration when it's time to move. http://nature.com/articles/ncomms13239 …
Prikaži ovu nit -
@neuromochi hypothesized that the brain’s economic choice regions, OFC and vmPFC, might do the same thing in choice. He took data from a choice task in which deliberation and execution were separated in time, and found evidence for orthogonalization between the two phases.pic.twitter.com/AIojqUO0TL
Prikaži ovu nit -
This result argues against a simple integrate to threshold procedure for choice, although it could be made consistent with some more complex integration models that include orthogonalization.
Prikaži ovu nit -
Another classic way to solve this problem is with anatomy: separate evaluation and execution regions. That solves the problem easily, but unfortunately, our recent data do not support such an anatomical sequestration. “Everything is everywhere”https://www.nature.com/articles/nrn2357 …
Prikaži ovu nit -
Indeed, it’s interesting that OFC and vmPFC look pretty much the same here. It supports our idea that choice takes place in both regions. And we would predict similar things happening elsewhere in the choice system as well.https://www.sciencedirect.com/science/article/pii/S0896627318305348 …
Prikaži ovu nit -
The most exciting implication is that motor system principles might also apply to the reward/choice system. That’s bad because we all have to learn some new math, but it’s good because it means we can hope for a Grand Unified Theory of action and choice. https://www.sciencedirect.com/science/article/pii/S0959438812000864 …
Prikaži ovu nit
Kraj razgovora
Novi razgovor -
-
-
Very nice
#tweetorial in a kind of a similar vein to ...?https://twitter.com/jeroenphv/status/1109146266494066688 …
0:19 -
Very cool study and great
#tweetorial! Thanks Mathis - Još 1 odgovor
Novi razgovor -
Čini se da učitavanje traje već neko vrijeme.
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.
I saw this at a birthday party a few years ago, and NEEDED to know how her brain achieves this level of being a good girl.
And here we go, our first results: