Linden Parkes

@lindenmp.bsky.social

🇦🇺 Assistant Professor of Psychiatry. Network neuroscience, NeuroAI, multimodal MRI, precision psychiatry. parkeslab.com

Thrilled to share our new paper deriving an ”Exposome Network” of functional connectivity capturing multidimensional env. exposures in youth, now out in DCN! 🌟🧠 doi.org/10.1016/j.dc... Huge thank you Sarah Lichenstein, @yiplab.bsky.social & our amazing Connecticut Collab! ❤️ #devpsy #neuroimaging

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doi.org

Arielle Keller@ariellekeller.bsky.social · 9mo ago

Happy New Preprint Friday!* Thrilled to share new results in collab with Sarah Lichenstein & @yiplab.bsky.social showing our brain's functional connections reflect the environments we grow up in! tinyurl.com/exposomeConnectivity #neuroskyence #PsychSciSky #DevPsy #cognition *can this be a thing??

New work on the effects of psychedelics on hierarchical cortical propagations out in PNAS! www.pnas.org/doi/10.1073/... Counter to our expectations, psychedelics attenuated bottom-up propagations into the Default Mode Network across substances and species. Thread below:

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

pnas.org

Here's bonus slides on cross-validation tests, separate from our preprint. Covering: 1. paired (sign-flip) permutation test 2. label-swap permutation test 3. sample-level vs fold-averaged stats 4. a common misapplication of the corrected t-test 5. three bootstrap variants 1/N

Thomas Yeo@bttyeo.bsky.social · 3mo ago

In a meta-analysis of 210 biomedical AI studies that statistically compared models under cross-validation, 97% used invalid statistical tests. Here's our new preprint doi.org/10.64898/202... led by @tianchu.bsky.social @hetuli.bsky.social @shaoshiz.bsky.social @nichols.bsky.social 1/N

So we propose SHARP, which involves repeated split-half to generate pairs of independent statistics. There are still 3 unknowns — mean, variance, between-repetition correlation — but the independent pairs provide a 3rd information source to estimate all 3 unknowns. 7/N

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Really excited to share a new preprint! 𝗛𝗼𝘄 𝗱𝗼 𝗯𝗿𝗮𝗶𝗻𝘀 𝘀𝘁𝗮𝘆 𝗿𝗼𝗯𝘂𝘀𝘁 & 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝘄𝗵𝗶𝗹𝗲 𝗯𝗲𝗶𝗻𝗴 𝗶𝗻𝗰𝗿𝗲𝗱𝗶𝗯𝗹𝘆 𝘀𝗽𝗮𝗿𝘀𝗲? We explore how! www.biorxiv.org/content/10.6... We built Connectome-based Neural Networks (CoNNs) using Drosophila wiring (larva&adult) & compared with random networks with same sparsity.

Constructing connectome-based neural networks

Our latest publication grapples with how the brain could implement gradient descent by sending learning targets top-down, gating plasticity with dendritic inhibition, and updating synaptic weights with biologically observed learning rules like BTSP. www.cell.com/cell-reports...

Cellular and subcellular specialization enables biology-constrained deep learning

Galloni et al. introduce “dendritic target propagation”: a Dale’s law-compliant learning algorithm for cortical microcircuits with soma- and dendrite-targeting inhibition and realistic connectivity co...

cell.com

Aaron Milstein@neurosutras.bsky.social · last yr.

New #NeuroAI #compneurosky preprint! To better understand how target-directed learning works in the brain, we sought to engineer an artificial neural network capable of solving complex image classification tasks that comprises only experimentally-supported biological building blocks. (1/15)

‪Ever wondered how GABAergic interneurons shape cognition? The IN-CODE consortium's latest NeuroView article introduces a "population approach", shifting the focus from individual interneurons to cooperative networks. Dive into the future of interneuron research here: doi.org/10.1016/j.ne...

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Intelligence is not just about having "strong" brain connections. It’s also about how efficiently the brain coordinates processing speed across regions. @lindenmp.bsky.social and @jason-z-kim.bsky.social share what their computer model is revealing about cognitive power: https://bit.ly/3LQuoxT

Computer model predicts aspects of cognitive performance

The Allen Human Brain Atlas helped researchers design a model that looked at “intrinsic neural timescales”

bit.ly