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Check out our new modelling paper, now on Biorxiv! https://www.biorxiv.org/content/10.1101/2020.01.28.921205v1 … We simulate how one can decode cortical alpha oscillations to identify memories by their unique temporal signatures, via some very cool binding and timing mechanisms.
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George Parish proslijedio/la je Tweet
Theta oscillations support spatial navigation and episodic memory -- but why do we often see negative theta effects in episodic memory studies with human subjects? Our new review provides some answers! Out
@TrendsCognSci with@esolomon and@KahanaMichaelhttps://www.cell.com/trends/cognitive-sciences/fulltext/S1364-6613(19)30294-3 …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
George Parish proslijedio/la je Tweet
Children's mental health affected by sleep duration Shorter sleep duration can increase the risk of children developing depression, anxiety, and cognitive problems.https://neurosciencenews.com/child-sleep-mental-health-15632/amp/ …
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George Parish proslijedio/la je Tweet
Signal transfer of visual stimuli to V4 occurs in gamma-rhythmic, pulsed information packages https://biorxiv.org/cgi/content/short/2020.02.03.931956v1 …
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George Parish proslijedio/la je Tweet
We've just extended our Method Challenge by one week. Email us at sushi@contacts.bham.ac.uk if you'd like the data! More info herehttps://memorybham.com/method-challenge …
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Thanks very much to
@s_michelmann,@SimonHanslmayr & Prof Howard Bowman for their time and patience on this project. Thanks also to@UniKentComp@memorybham for facilitating! Code is available on GitHub:https://github.com/GP2789/The-Sync-fire-deSync-Model …Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
If such a hierarchical mechanism is used by the brain to keep tempo, then we think it must be oscillatory. If bindings are made during the handover periods (Ai), then all sorts of conjunction errors would ensue (B). Best to leave an oscillatory gap to safely segregate time (Aii).pic.twitter.com/V6fEV0qVPd
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Visualising the replay process: we see how information flows upwards through the network by looking at intracellular currents. The intrinsic cortical alpha rhythm is disrupted by the activation of relevant binding units, which in turn are activated by relevant temporal positions.pic.twitter.com/avPEIr0iqQ
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Visualising the encoding process: it's cool to see how excitatory (blue) and inhibitory (red) neurons from each region react to input (left), inducing inter-regional calcium influxes (red) & weight change (black) to occur (right). All of this in relation to NC alpha phase (top).pic.twitter.com/PJS5ywcGtx
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This model successfully simulates the excellent paradigm developed by
@s_michelmann in Michelmann, et al (2016)https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4975452/ …Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
When we present loads of sequences to our model, we see a large alpha power decrease. Then, using alpha phase-reset patterns, we can identify unique memory traces. Here, trials of the same pattern are more similar to each other than they are to trials of different patterns.pic.twitter.com/pnmRGsFlla
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Events disrupt cortical oscillations, which in turn triggers a unique index to bind cortical content to a discrete moment in time (left). Restarting the clock plays back this content (right). One can detect when this content is reinstantiated by using RSA on alpha phase (bottom).pic.twitter.com/9WRszf6H0D
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There are 3 regions in our model: an intrinsically oscillating cortical region, and binding & timing regions, where events are indexed in relation to a ticking, oscillatory clock. By restarting the clock later, relevant bindings correctly reactivate cortical memory traces.pic.twitter.com/f6qo40cuWE
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We simulate synfire chains (groups of sequentially connected cell groups) in a hierarchy to maintain temporal rhythm, in much the same way as a clock. This allows us to store the absolute timing between a sequence of events.pic.twitter.com/O6eqMTbQyD
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George Parish proslijedio/la je Tweet
Last chance to submit an abstract for
#SUsHi2020. Deadline is 23:59 GMT tomorrow (22nd) https://memorybham.com/abstract-submission …pic.twitter.com/TVfowHFZXu
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George Parish proslijedio/la je Tweet
The hippocampal formation as a hierarchical generative model supporting generative replay and continual learninghttps://www.biorxiv.org/content/10.1101/2020.01.16.908889v1 …
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George Parish proslijedio/la je Tweet
Submit your SUsHi abstracts - deadline is next Wednesday 15th! https://memorybham.squarespace.com/abstract-submission …
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George Parish proslijedio/la je Tweet
A calm
#sunrise on the canal to give you some#MondayMotivation today.
Carl Draper - Waveslider Photography
Ashby Canal at Stoke Goldingpic.twitter.com/w60E1XCCan
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George Parish proslijedio/la je Tweet
Ooh là là! Music evokes 13 key emotions. Scientists have mapped them Findings suggest there are 13 overall categories of experience preserved across cultures that correspond with specific feelings.
#musicmonday#sciencehttps://neurosciencenews.com/music-13-emotions-15407/amp/ …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
George Parish proslijedio/la je Tweet
Consider: millions of years ago our antecedents gave a massive sacrifice of their left hemisphere. We lost a tremendous amount of short term memory and replaced it with Broca’s, Wernicke & the phonological loop. But why? So we can—talk. Thus chimpanzees can do this—we can’t:pic.twitter.com/CDznxg37p1
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