Harrison Ritz

From the top of my head, here some recent ones:

"Two views on the cognitive brain" by @johnwkrakauer.bsky.social, @dlbarack.bsky.social

"Reconstructing computational system dynamics from neural data with recurrent neural networks" by @durstewitzlab.bsky.social et al

1/3

After several years of work, my lab is starting to put out our first papers on learning in a unicellular organism (Stentor coeruleus).

Here we show evidence for a form of associative learning in Stentor:
www.biorxiv.org/content/10.6...

🚨 New Paper: Controlling the Human Connectome with Spatially Diffuse Input Signals

Now in press at Communications Biology!

www.nature.com/articles/s42...

Two-photon calcium imaging at 24,000 lines/s, with the resonant axis spanning 4x what other systems can do. Inertia-free. Diffraction-limited. No tradeoffs. Che-Hang Yu developed a 4x angle multiplier for laser scanning. His paper is out today: opg.optica.org/optica/fullt... 1/n #fluorescenceFriday

nothing more powerful!

How dynamics arise from the structure is my biggest interest. In this study, we started with a small step and asked how structure constrains dynamics. Spoiler: would that it were so simple… (1/6)

Awesome!

Looks very cool, congrats guys

Why is touch perceived as weaker during movement?

In our new preprint 📝, we examine tactile suppression during reaching.

Using optimal control theory, we show that tactile suppression reflects dynamic, uncertainty-dependent integration of forward model predictions and sensory feedback.

Triple paper drop from the inimitable @willydorrell.bsky.social :

1) A normative theory of prefrontal working memory slots.

2) A comprehensive review of normative theories of why grid cells look like grid cells.

3) A new theory of convex efficient coding.

(0/3)

cool people, follow them!

I built a bluesky labeler for neuroscience methods.

1️⃣ follow/subscribe to: @neuromethods.bsky.social
2️⃣ like the post with your favorite method
➡️ get a shiny methods label in your profile/posts. 🌟

nice work!

Very happy to share this new paper, published in @elife.bsky.social, the last one stemming from a PhD chapter 🥲. In it, @spk3lly.bsky.social and I show that an early V1 signal (the C1) can have direct influence on a perceptual decision.

Here's the link: doi.org/10.7554/eLif...

𝗔𝘁𝘁𝗿𝗮𝗰𝘁𝗼𝗿 𝗱𝘆𝗻𝗮𝗺𝗶𝗰𝘀 𝗶𝗻 𝘁𝗵𝗲 𝗯𝗿𝗮𝗶𝗻
Looks like a very cool paper about the dynamics of large-scale networks in the mouse brain.
Starting to be all about dynamics!
journals.plos.org/ploscompbiol...
#neuroskyence

Screening, sorting, and the feedback cycles that imperil peer review The process of peer review is vital to contemporary science, but is also under enormous strain. This study uses mathematical models to dissect the threats to the long-term viability of peer review, su...

1. Kevin Gross and I have a new paper out today PLOS Biology.

We used economic models based around screening games and the market for unpaid labor to highlight a meltdown cycle threatening peer review.

New paper from the lab now out online! @changrun-huang.bsky.social asked whether people use informative pre-cues to up-regulate cognitive control in the spatial Stroop task. Surprisingly, they do not, and we rule out some possible reasons why. Enjoy!

Ten simple rules for building a collaborative coding culture

This was such a fun collaboration with @analog-ashley.bsky.social and team, including some of our own @sciencebanshee.bsky.social and @shen4brains.bsky.social And h/t to Alana McPherson for the infographic!

dx.plos.org/10.1371/jour...

in my decision-making course we devote one class to a group exercise in which the students need to use what they learned in Act 1 ("Rational Decision Making") to shut down a rogue AI in the semi distant future; this is the intro.

This is awesome.

How many copies of Carcassonne do you have!?

Wondering if all this scrambling & time pressure to secure CERC & CI+RC candidates is going to bite Canadian Institutions in the butt…

Though I am 💯 for attracting international talent & growing R&I in Canada, this whole approach & process has been problematic in so many ways: .. 1/

What if we could tell you how well you’ll remember your next visit to your local coffee shop? ☕️

In our new Nature Human Behaviour paper, we show that the 𝗾𝘂𝗮𝗹𝗶𝘁𝘆 𝗼𝗳 𝗮 𝘀𝗽𝗮𝘁𝗶𝗮𝗹 𝗿𝗲𝗽𝗿𝗲𝘀𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻 can be measured with neuroimaging – and 𝘁𝗵𝗮𝘁 𝘀𝗰𝗼𝗿𝗲 𝗽𝗿𝗲𝗱𝗶𝗰𝘁𝘀 𝗵𝗼𝘄 𝘄𝗲𝗹𝗹 𝗻𝗲𝘄 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲𝘀 𝘄𝗶𝗹𝗹 𝘀𝘁𝗶𝗰𝗸.

brutal

I don’t know if chequing a guy in the head like that is so nice

LFG

strawberry wafers

I reviewed 5+ fMRI papers on response inhibition within roughly the last year, and the same points come up over and over again. So I wrote a short note last week entitled "The unique limitations of BOLD-fMRI in the study of response inhibition". You can read it here.
osf.io/preprints/ps...

My only regret about moving back to Canada is leaving Bean Club

New preprint out 🎉

What happens to the hippocampal “place code” when an animal is actively engaged in a task?

The answer surprised us (and might surprise you too!).

Let's dive in ⬇️

Link:
"Hippocampal trace coding dominates and disrupts place coding" www.biorxiv.org/content/10.6...

We had a go at a blog about our recent dynamical systems foundation model published at NeurIPS (with strong support from the Structures outreach team!) … let us know your thoughts!

No autocorrelation and perfectly Gaussian is basically impossible