Shervin Safavi
@neuroprinciples
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searching for principles, empirical approach, integration | doing comp neuro & psych | PI @CompNeuro_lab @tudresden_de | ex-@MPICybernetics (Dayan & Logothetis)
Dresden, Germany
Joined November 2013
" ... but to understand and advance the *collective understanding*"; How to Criticize with Kindness https://t.co/28pbnqtzgo via @brainpicker
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Happy to share my first post-doc paper with Peter Dayan just published at @NeuroCellPress "Multistability, Perceptual Value, and Internal Foraging" Paper (free access before Oct 18th): https://t.co/h0Z3RGtO0H No access? Email me at neuron2022@shervinsafavi.org π§΅π
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Popular opinion: V1's intracortical connections are too slow, feedback connections convey contextual influences in neural responses. Analysis in a unique set of data: conduction velocity of the intracortical axons grows with distance and is fast enough https://t.co/pce4iEq866
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Brain-like features in homeostatic deep reinforcement learning agents (Thank you @neuroprinciples!) https://t.co/EkrQmLWiIH
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@StphTphsn1 @taherehtoosi Let me (mis)use @taherehtoosi's tweet on her great study, to also draw attention to our approach to bistable perception based on reinforcement learning and decision-making models (which I think brings a complementary perspective):
Happy to share my first post-doc paper with Peter Dayan just published at @NeuroCellPress "Multistability, Perceptual Value, and Internal Foraging" Paper (free access before Oct 18th): https://t.co/h0Z3RGtO0H No access? Email me at neuron2022@shervinsafavi.org π§΅π
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How does our brain excel at complex object recognition, yet get fooled by simple illusory contours? What unifying principle governs all Gestalt laws of perceptual organization? We may have an answer: integration of learned priors through feedback. New paper with Ken Miller! π§΅
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My lab @MPI_Biochem in Martinsried/Munich is recruiting PhD students through this program. Deadline October 31.
π Ready to expand your horizons in #AI research? Do your PhD with 2 leading institutions across Europe & build your network with the Academic Track in the #ELLISPhD Program. Apply now via our central recruiting portal until Oct 31. π All info: https://t.co/0Tq58uexHk
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Our review is out π We discuss how neural computations in the retina shape behavior, continuing the top-down tradition of Lettvin et al.'s classic bug-detector neurons Check it out π https://t.co/V5jdRMUR6S
@AnnualReviews w/ coauthors @AnnaIntegrated & @SerenaRiccitel2
annualreviews.org
Since Lettvin and colleaguesβ seminal discovery of bug detector neurons in the frog retina, understanding how retinal circuits support behavioral demands has been a central goal of visual neuroscie...
The most recent volume of the Annual Review of Vision Science is online. Check out the table of contents https://t.co/86S0UA6ZRd
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Congratulations to John Clarke, Michael Devoret, & John Martinis @NobelPrize in Physics "for the discovery of macroscopic quantum mechanical tunneling & energy quantization in an electric circuit" in 3 PRLs https://t.co/ZJWyJB8ta4
https://t.co/rYlODViEZR
https://t.co/M7tyw1KFzD
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Our lab at the European Neuroscience Institute GΓΆttingen is looking for a highly skilled and motivated π©βπ¬TECHNICAL ASSISTANT. Are you proficient in histological and wet lab techniques and lab management? Then come apply for our position (4 years contract)!
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What defines a brain state? π§ If you are also interested in answering this question, join us in "Toward a joint definition of neural-behavioral states", #BernsteinConference full-day workshop, Co-organized by @neuroprinciples and I. (1/4)
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Oops, wrong time in the original tweet! It will be 15:30 CET π
In our Learning Club @CompNeuro_lab today (Sep 25, Thu, 2pm CET), @DengPan18 will tell us about his recent paper (π) [joint work w/ Rushworth lab]. Want to attend, send an empty email to virtual-talk-link-request@cmclab.org to get the link!
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In our Learning Club @CompNeuro_lab today (Sep 25, Thu, 2pm CET), @DengPan18 will tell us about his recent paper (π) [joint work w/ Rushworth lab]. Want to attend, send an empty email to virtual-talk-link-request@cmclab.org to get the link!
π¨We believe this is a major step forward in how we study hippocampus function in healthy humans. Using novel behavioral tasks, fMRI, RL & RNN modeling, and transcranial ultrasound stimulation (TUS), we demonstrate the causal role of hippocampus in relational structure learning.
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In our Learning Club @CompNeuro_lab today (Aug 18, Thursday, 2pm CET), @LiebanaSamuel will tell us about his paper ( https://t.co/HCg6GfmN5H) [joint work w/ @SaxeLab & @ArminLak ]. Want to attend, send an empty email to virtual-talk-link-request@cmclab.org to get the link!
cell.com
Longitudinal tracking of long-term learning behavior and striatal dopamine reveals that dopamine teaching signals shape individually diverse yet systematic learning trajectories, captured mathemati...
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π’ We have a new notebook that demoes DPAD (@NatureNeuro 2024) in public neural-behavioral data from start to finish, answers FAQs, & gives best practice tips! Check it out! π Link is in the repo: https://t.co/FqkKzyqsYs π Thanks @Vahidi_Parsa & @MaryamShanechi! Paper π§΅β¬οΈ
Excited that our paper made the cover of @NatureNeuro! We developed DPAD, an AI framework for dynamical modeling of neural-behavioral data and dissociating behaviorally relevant neural dynamics. π https://t.co/Uz71hQX2ZL π» https://t.co/ghiUGzxs0e π@omidsani
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The central visual field not only benefits from a denser sampling in retina and a higher cortical magnification factor, but also enjoys more top-down feedback along the visual pathway to aid visual recognition. See psychophysics evidence https://t.co/7zIBmeE8Va
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Check out our new preprint where we analyzed the dynamics of over ten thousand neurons across 223 brain areas and uncovered a surprising universal principle that describes the organization of intrinsic timescales across the entire mouse brain, including subcortical structures!
Excited to share our new preprint on the brain-wide organization of intrinsic timescales at single neuron resolution. Work w/ @roxana_zeraati, @IntlBrainLab, @SelfOrgAnna, @EngelTatiana: https://t.co/vM1TZ9NN7M Here is a #tweeprint:
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Excited to share our new preprint on the brain-wide organization of intrinsic timescales at single neuron resolution. Work w/ @roxana_zeraati, @IntlBrainLab, @SelfOrgAnna, @EngelTatiana: https://t.co/vM1TZ9NN7M Here is a #tweeprint:
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New work with @YanliangShi, @roxana_zeraati, @IntlBrainLab, @SelfOrgAnna. We uncover the principles that organize intrinsic timescales of single neurons across the entire brain, unifying regional specialization with universal brain-wide dynamics:
biorxiv.org
Variations in intrinsic neural timescales across the mammalian forebrain reflect the anatomical structure and functional specialization of brain areas and individual neurons. Yet, the organization of...
Excited to share our new preprint on the brain-wide organization of intrinsic timescales at single neuron resolution. Work w/ @roxana_zeraati, @IntlBrainLab, @SelfOrgAnna, @EngelTatiana: https://t.co/vM1TZ9NN7M Here is a #tweeprint:
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Brain-wide organization of intrinsic timescales at single-neuron resolution https://t.co/AZNxen4M6i
biorxiv.org
Variations in intrinsic neural timescales across the mammalian forebrain reflect the anatomical structure and functional specialization of brain areas and individual neurons. Yet, the organization of...
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If you are still around for #ccn2025, and want to know more about internal states, and cool methods to find them visit @ArmanBehrad's poster C160!
Still curious about uncovering internal state β completely unsupervised? We start in 30 minutes.
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