#episodicmemory — Public Fediverse posts

@nadel @cogneurophys
Thanks for doing this! I love this series almost as much as the sight of you following white tie dress code (!!)

At the risk of seeming sycophantic, as a grad student I always appreciated your encyclopedic knowledge esp. "there's nothing new under the sun" earlier work that warrants more recognition, or historical details, a la https://onlinelibrary.wiley.com/doi/10.1002/hipo.23027

So I'd love to hear underappreciated or unsung heroes, esp. to counteract the Matthew effect.

more hashtag fun #episodicmemory #contextmemory #neuroanatomy #memory #neuroscience #predictiveCoding #navigation

Hi all 😃​
Our latest #Review on #SplitterCells is now published in @eLife !!
I will probably write a real thread on it when I get a chance... for now:

link: https://elifesciences.org/articles/82357

why: some neurons in the #Hippocampus (and other brain regions) of #Rats (and other mammals) have the fascinating ability to discriminate not just different presents, but different past or future states or trajectories in the same current situation. They could be related to #EpisodicMemory or #DecisionMaking 🤔​They are called 'trajectory-dependent cells' or Splitter Cells. 🔀​ We tried to make sense of them!

what: Hippocampal Splitter cells do a lot of puzzling stuff. For example there's a lot of them even in tasks that do not require the Hippocampus to be solved. They spread asymmetrically on a linear track leading to a choice point - 'past' splitters around the start and 'future' splitters towards the choice point. #TimeCells cells can be splitter cells (but they're usually #PlaceCells). Splitter cells evolve with experience, or maybe it is performance, nobody really knows. ​⁉️​ ... and a lot more weird stuff

conclusion: Two different computational models, the temporal context model and the latent state model, each explain a subset of the properties of splitter cells... so perhaps the Hippocampus implements both! But more experiments are needed to disentangle them 😄​

now what: questions or comments? Please let us know!! ✍️​

#Neuroscience #Cognition #NeuroPaper

Xianshuai Zeng presenting results from Project 2 at SFN 2022 in San Diego.
@SfN_Events #episodicmemory #compneuro #spatiallearning #learningandmemory