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Prikvačeni tweet
Very excited to share our new paper, out today in
@NatureComms with@mkwittmann Anna Shpektor,@Daria_EA_Jensen, and Matthew Rushworth@OxExpPsy@OxfordWINhttps://www.nature.com/articles/s41467-019-12557-z …Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Miriam Klein-Flügge proslijedio/la je Tweet
An ACC-basal forebrain circuit influence when to act and can be modulated using transcranial ultrasound stimulation (TUS). Fantastic collaboration with
@nima_khalighi,@jerome_sallet,@LennartVerhagen,@jf_aubry, Matthew Rushworth, et al.https://www.cell.com/neuron/fulltext/S0896-6273(19)30925-0#.Xe4ww049hZo.twitter …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Miriam Klein-Flügge proslijedio/la je Tweet
Somewhat new paper... Textbooks happily ignore that the amygdala and prefrontal cortex are connected through two pathways, not one. To understand amyg-PFC interactions - so vital for psychiatry - we need to do better. Anatomy matters! http://doi.org/10.7554/eLife.47175 …
@OxExpPsy@OxfordWINpic.twitter.com/uRuIKmbVLX
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Thanks
@McGintyNeuro for the nice summary, I also really enjoyed all the talks at#OFCMeeting2019https://twitter.com/McGintyNeuro/status/1196991709764366343 …
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Beautiful new work from
@davidefolloni@LennartVerhagen@jerome_sallet and Rogier Mars characterising tracts running from the amygdala to PFChttps://twitter.com/davidefolloni/status/1192043166540673030 …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
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Miriam Klein-Flügge proslijedio/la je Tweet
The high resource impact of reformatting requirements for scientific papershttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0223976&utm_source=STAT+Newsletters …
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Miriam Klein-Flügge proslijedio/la je Tweet
How our
#Brains remember depends on how we learn http://www.ox.ac.uk/news/2019-10-24-how-our-brains-remember-things-depends-upon-how-we-learn-them … Multiple networks in the brain store knowledge. Damage to one brain area will leave alternative mechanisms for learning.@MKFlugge@mkwittmann#AShpektor@Daria_EA_Jensen#MRushworth@OxfordWIN@NDCNOxford
pic.twitter.com/f7xQe6Zl4s
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We’d like to thank our reviewers who have made this a better paper! To support
@openscience unthresholded fMRI maps are available on Neurovault (https://identifiers.org/neurovault.collection:5765 …) and data+code underlying all figures on@OSFrameworkhttps://osf.io/y325aPrikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Why is this relevant? We have discovered that learnt knowledge is stored in different brain circuits depending on how the knowledge was acquired. This means, for example, that someone with a lesion in one part of the brain will still be able to use alternative learning mechanisms
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As previously shown – ventral striatum shows prediction error like responses consistent with RL theory, here for the first element of the sequence ABCD. It does not show full knowledge of the RL-acquired sequence structure.pic.twitter.com/gJ9V18UcBx
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(3) Average (noncontingent) learning does not only happen in time (i.e. learning about stimuli that are temporally close by), as previously shown, but also in space and thus for stimuli that are nearby in space. The amygdala also mediates this type of association.pic.twitter.com/6ekcc4K8ht
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By contrast, we find that knowledge acquired via reinforcement in (1) is persistent and robust and slow to change.
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(2) Statistical map-like learning helps people know spatial relationships between stimuli, but also which stimuli are likely followed by which other stimuli (transition frequency). This knowledge is found in mPFC and amyg/hippo, and it flexibly adjusts to changing task demands.pic.twitter.com/aogBrEmnM7
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(1)Reward-learning leads to knowledge of a path to the goal (here reward). In our case four elements of a four-step sequence ABCD are learnt backwards by trial and error. The correctly ordered representation is present in temporal pole and posterior orbito-frontal cortex.pic.twitter.com/mgux7vcHI8
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Here we don't focus on the learning process itself, but on the neural representations of the learned information. We show that different regions of the brain are important for storing the knowledge acquired through these three different learning mechanisms. In brief:
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Other labs have of course invested great effort in studying some of these learning mechanisms already including Jill O’Reilly,
@alexa_tweety,@behrenstimb@GJocham@nico_schuck@yael_niv@nathanieldaw@RobbRutledge Philippe Tobler, Bolton Chau and many others...Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
(3) By contrast to RL, noncontingent learning does not link precise stimuli with precise outcomes but instead relies on simpler "average" mechanisms (if things are good in general, then presumably my recent choices were not that bad).
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(1) Statistical learning is based on observing relationships in the world (e.g. slowly acquiring the map of a city). (2) RL refers to learning driven by reinforcement (i.e. incentives or goals, e.g. learning to turn on music using a CD player) and is a contingent form of learning
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In this paper, we are looking at three ways in which humans learn information about the world and characterise their dissociable neural pathways and representations: (1) statistical learning, (2) reinforcement learning (RL) and (3) noncontingent learning.
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