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Re: 1st sent, that was the view of Nadel 1991. I don't agree; IMO this view is reflective of exp'tal and analytical choices in HPC lit, rather than evolutionarily distal explanations emphasizing space. Also, it's not supported by primate lit, which I hope to explain in a reviewpic.twitter.com/x9u6xQqiVz
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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 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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I wasn't referring to three levels -- I was referring to his theory of archicortex. He considered its computational role regarless of specific inputs and supposed it formed a temporary store of raw information derived from sensory experience. And he generated testable predictionspic.twitter.com/FV43TAeCP8
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Fun aside, in grad school I wrote code to re-create this color map, but I decided not to use it for the pub because it is non-linear and non-parametric (so won't convert predictably to gray-scale). I still really want to use it for presentation purposes tho, it's iconicpic.twitter.com/l8Lmq3R4fU
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I've shared my preprint with monkey hc data with you once before, and you gave some valued feedback re: discussion of remapping literature. I'll be able to share a peer-reviewed publication soon, but in the meantime, I'll point you to this example neuron, which fires at 2 locspic.twitter.com/44RWxYTnnB
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For more about how we’ve developed current theories of hippocampal function, with a special focus on what we’ve learned from studies on non-human primates, come chat at my History of Neuroscience poster Sunday afternoon https://www.abstractsonline.com/pp8/#!/7883/presentation/53134 …
#SFN19pic.twitter.com/txsPelvCGM
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If you’re interested in learning more about what populations of neurons in the monkey hippocampus encode (it’s not just space), please come by my dynamic poster (DP11) Sunday morning! https://www.abstractsonline.com/pp8/#!/7883/presentation/56247 …
#SfN19pic.twitter.com/c2oC0jVQ1H
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Sometimes on the UWO campus the sunrise was just as beautiful as a sunset. Tomorrow’s sunrise will be at
@ZuckermanBrain, to work with@StefanoFusi2 and@cdsalzman. Endless thanks to@JulioMTNeuro for all of your teaching, guidance, mentorship, and friendship along the way.pic.twitter.com/zqWvdAkuPk
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Authors also present challenges & propose mods for use in free-moving animals, which would be a significant advance on for
@nature's method of the year https://www.nature.com/articles/s41592-018-0292-8#article-info …pic.twitter.com/TM17TRBjIt
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Our new paper shows that primate hippocampal neurons encode space differently across cognitive tasks in the same virtual environment due to sensory and memory encoding of task features Associative memory task: https://youtu.be/RHx9Lw65oDw Foraging task: https://youtu.be/aWvheMzxMJo https://twitter.com/biorxiv_neursci/status/982385204600942592 …
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Brain-wide activity during feeding. So much data! There's gold in them thar hills
@biorxivpreprint@biorxiv_neursci http://biorxiv.org/content/early/2017/04/28/131532 …pic.twitter.com/KAA6ejeNua -
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