Darcy Waller

If you’re a @cogneuronews.bsky.social member, check out and vote on the great lineup of symposia for 2026, and plz consider our symposium “Non-invasive meso-scale dynamics of perception and cognition”, organized by @adykstra.bsky.social including James Bonauito and @lonikefaes.bsky.social!

A patent filed by the lab is up for a Brown Innovation of the Year award! “Personalized Transcranial Magnetic Stimulation (TMS) Delivery Protocols Based on Computational Modeling of the Electromagnetic TMS-evoked Response” was filed by Drs. Sliva and Jones.

View and vote here tinyurl.com/nx37789m

Want a high-level overview of how HNN works? Check out this short comic by our lab manager Joyce (@kermieeart.bsky.social)!

tinyurl.com/27xrksez

#compneuro #sciart #comics

🚨Interested in Dystonia?🚨
@braincircuits.bsky.social

GPi DBS for dystonia is effective.

More recently, STN DBS has been investigated, as an alternative.

In what enfolded like a stunning thriller to me, Konstantin Butenko tells a tale of two networks…

www.pnas.org/doi/10.1073/...

"exhaust fumes" made it into the official abstract!

hence completing the journey from an epiphenomenal shitpost blog to a full-blown review paper.

all thanks to this cast of co-authors (esp. Sander), our TICS editor Lindsey Drayton, and two very engaged reviewers (@danielemarinazzo.bsky.social)

A shameless plug now that science Twitter has migrated to Bluesky: I'm on the (clinical academic) job market! If anyone is looking for an early career clinical neuropsychologist with expertise in lesion-deficit mapping, neuroimaging/tractography, and estim+behavior, please let me know!

Loving the starter packs and would love to put one together full of #compneuro trainees on here! Please share and comment if you want to be added or tag your trainees and I’ll put one together😊 #neuroscience #neuroskyence

Excited this work is now in it's fully published form at JOCN!

"Reward accelerates the preparation of goal-directed actions under conflict"

Check out the full Special Focus on the Neural and Computational Mechanisms of Motivation and Decision Making!
direct.mit.edu/jocn/issue/3...

Starter pack for researchers studying the control of cognitive processes

e.g., attentional control, inhibition, task switching, working memory, error adaptation etc

go.bsky.app/12KTqED

Some resources i've curated for the cognitive and computational neuroscience communities on bluesky! First, a twin set of starter packs. go.bsky.app/2n84SRM

Here's a somewhat sparse Dopamine / Basal Ganglia starter pack. Please self-nominate to add! go.bsky.app/B2kViZY

Upon popular demand I created a started pack for people interested in Deep Brain Stimulation!
Lmk if you'd like to be added!

go.bsky.app/B9A9Cho

First go at a starter pack for everyone who is interested in Cognitive Control research.

go.bsky.app/R28hGhN

Let me know if I should add anyone.

#neuroskyence

Hey #neuroskyence, want to visit Brown and engage with our brain science community? 🐻🧠 There’s still time to apply for the BrainExPo (external postdoc) speaker series for this Spring! Visit bit.ly/CarneyBrainExPo for instructions on how to apply before the Dec. 1 deadline.

Dorsomedial frontal cortex damage impairs error-based, but not reinforcement-based motor learning in humans
doi.org/10.1093/cerc...
#sensorimotor #neuroskyence

I'm psyched to be back at for #SFN2023 (it's been a minute!) Come check out our poster on neurocomputational mechanisms of reward and aversive motivation on mental effort allocation!

TT24, Monday 11/13, 1-5 PM.

👎🏻😢 M/EEG analysis gifs are a critical user feature

Thanks for reading and we’re looking forward to hearing what reviewers and colleagues think! (8/8)

We hope these predictions are exciting, useful to those wanting to better connect mechanism with behavior in the stop signal task. I’m also v excited about potential for HNN models to generate similar predictions w/ FC-ERPs in other contexts (ERN, RewP, oddball P3, etc.) (7/)

Check out all the other fun details in the preprint, including alt models addressing: can anything else explain P3 diff? What’s going on with P2/N2 mechanisms? What if different parts of the FC-ERP come from different columns?? (6/)

Our modeling also predicted mechanisms producing ERP feature diffs between successful, failed stops. Thalamocortical drive producing the P3 is later, but not weaker, in failed stops, in line w/ race model prediction of a later but not weaker Stop process. (5/)

To assess, we used @HNNsolver’s biophys model of a cortical column under external drive to predict mechanisms of the FC-ERP features after the stop signal (P2, N2, P3). A sequence of drives strikingly similar to those proposed to produce sensory ERPs can accomplish this. (4/)

Such interpretation is 🔑 in hypotheses about meaning of ERP features in the stop-signal task (esp wrt the horse race model’s Stop process). P3 onset is proposed to index Stop because of early timing when stops successful, but unclear if mechs support this link. (3/)

Frontocentral ERPs (FC-ERPs) are proxy signals of cognitive control processes. But, we don’t know if grand average ERP behavior = similar behavior of underlying mechanisms, given complex cortical dynamics. This is a problem for theoretical interpretation. (2/)

🚨New preprint alert!🚨

In 1st study from my postdoc, Stephanie Jones and I (in collab with @janw.bsky.social) used @HNNsolver to model thalamocortical mechanisms of the human frontocentral ERP during stopping.

We offer novel, testable predictions about those mechanisms. 🧵👇 (1/)

Applications are now open for the Carney Institute’s spring 2024 season of the BrainExPo (external postdoc) seminar series!

If you are an advanced postdoc in brain science, apply to visit Brown + give a guest talk! Logistical info at linked page. Deadline is Dec. 1.

#psychscisky #neuroskyence

Forever not a fan of the purgatory of biorxiv screening time.

Hi #neuroskyence #psychscisky,
I’m a postdoc at Brown w/ Steph Jones. I study human inhibitory control. Currently I’m using biophysical cortical models to understand the basis of macroscale EEG/LFP signatures of stopping.

I also like running, travel, food, et al.

Look forward to connecting here!