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Prikvačeni tweet
#tweeprint! Have you ever wanted to learn about spatial and non-spatial hippocampal function, especially in primates? We look at single neurons + ensemble activity across tasks during virtual navigation in a new paper with@JulioMTneuro in@NatureNeuro https://www.nature.com/articles/s41593-019-0548-3 … 1/Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Rob Gulli proslijedio/la je Tweet
Excited to announce our bioRxiv paper describing OpenMonkeyStudio. This is a BIG three-lab project that took a LOT OF people working very hard a lot of time.
@NeuroPolarbear@neuromochi@bala_praneethttps://www.biorxiv.org/content/10.1101/2020.01.31.928861v1 …Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Rob Gulli proslijedio/la je Tweet
See the impressive visualization of
@jordandekraker 's uncovering of hippocampal subfileds by unfolding and unsupervised clustering of laminar and morphological features in the 3D BigBrain at https://youtu.be/85rMpgv2_cg@MCINation@TheNeuro_MNIpic.twitter.com/UoZ43uZ0xC
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Livestream of a talk by
@neuroNJactivist at Columbia's@ZuckermanBrain starting now!https://columbia.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=6ec51427-f25a-486d-832b-ab25013fa665 …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Rob Gulli proslijedio/la je Tweet
So, in summary our model shows: (i) how gating and inhibition can contribute to memory, (ii) how memory access/availability dynamically change over time, and (iii) how context representations, such as those observed in hippocampus and PFC, may interact with and control memory.pic.twitter.com/TZXLSFlQct
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Thanks
@JulioMTNeuro for trusting me to start this line of research, building such an awesome team, and becoming such an important mentor and friend through all of our journeys together!https://twitter.com/JulioMTNeuro/status/1214366009114742784 …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Rob Gulli proslijedio/la je Tweet
Exciting new work from
@JulioMTNeuro@rob_gulli@StefanoFusi2 and colleagues showing task-dependent spatial and non-spatial representations in the primate hippocampus.https://twitter.com/NatureNeuro/status/1210567277302702080 …
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Rob Gulli proslijedio/la je Tweet
Neurons in primate
#hippocampus non-linearly mix information about space and non-spatial elements of the environment in a task-dependent manner; this efficient code flexibly represents unique perceptual experiences and corresponding memories https://go.nature.com/2ZisOrF pic.twitter.com/TKicGRlCYE
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There's more to this story that we're still working on, so stay tuned. Cc also
@Neuro_Physics@MemoryLab@eabuffalo@jacobbellmund@doellerlab@perpl_lab@jaaanaru@dunmao_@mjaztwit@roozbeh_kiani@jjsakon@andpru 13/Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I could never thank my co-authors enough for their work on this. Ben is an incredibly thorough scientist. Guillaume is a programming genius. Lyndon is a mathematical wizard. This couldn't be possible without them, and funding by
@NSERC_CRSNG@CIHR_IRSC@mcgillu@WesternU@NSF 12/Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
So what does this mean for our understanding HPC function? ATM, I believe that neuropsychological theories (memory, space) contain less explanatory power than computational theories (cc
@StefanoFusi2@neuro_kim@jcrwhittington@behrenstimb@ProfData@Rob_Mok@tyrell_turing) 11/Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
We showed that hippocampal neurons could be used to decode space in primates during virtual navigation. However, representation of space is not stable across tasks. Task-specific activity that looks spatial can be tuned to nonspatial parameters that are relevant for behavior. 10/
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We found that hippocampal neurons encoded objects, and interaction with context as both perceptual and mnemonic representations. Neural activity could be used to read out specific trial type in the Associative memory task as well. 9/pic.twitter.com/9XqVqP7Ulx
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The lack of stable coding across tasks was striking in the portions of the maze that were especially relevant in the Associative memory task. So, we next examined non-spatial, task-specific activity during the Associative memory task. We looked for perceptual & mnemonic coding 8/
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The ensemble could support decoding of position in the maze in each task, but the code for space did not generalize across tasks. There are important nuances and implications here, see the paper for full detail. 7/pic.twitter.com/o9YmpyAoT9
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Figs 1 & 2 of the paper show single-neuron changes in spatial selectivity across tasks. In Fig. 3, we ask whether coding of spatial position generalized across tasks. 6/pic.twitter.com/X2MRecqo80
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Subjects also completed an Associative memory task in the same environment, which required learning a new set of context-dependent object values every day https://youtu.be/RHx9Lw65oDw 5/
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One task required just cue-guided navigation, inspired by classic studies of rodents foraging for sugar pellets in an open arena https://youtu.be/aWvheMzxMJo 4/
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It's difficult to study spatial and nonspatial activity in single neurons (but see great expts by
@SuthanaLab,@ArneEkstrom1,@neurojosh,@QasimEtal,@KahanaMichael). For a new approach, we trained monkeys to complete two behavioral tasks in a single VR envt. 3/Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
I started my thesis wanting to study memory in the hippocampus, inspired in part by Brenda Milner & Wilder Penfield. I quickly learned the complexity of this story, with conversation over the primacy of spatial versus non-spatial mnemonic function in the hippocampus 2/
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