Max Elliott

Max Elliott

@maxwellelliott.bsky.social

Assistant Professor UMN | Studying individual differences in brain and cognitive aging. https://elliottlab.psych.umn.edu

121 followers119 following24 posts

Max Elliott reposted

📣 New preprint: Multiple Nested Distributed Language Networks in the Human Brain. 📣 Brain regions specialized for language have been extensively described. But are they organized into one network, or multiple? Our new preprint provides evidence for the latter:
 www.biorxiv.org/content/10.6...

biorxiv.orgMultiple Nested Distributed Language Networks in the Human BrainBrain regions specialized for language have been extensively described, yet their arrangement into one or multiple networks remains debated. Using precision functional mapping across three independent...

Max Elliott reposted

Max Elliott reposted

🚨 New preprint: Objective Quality Assessment for Precision fMRI Precision functional mapping (PFM) enables individual-level brain network studies — but demands more, and better, data. We introduce an objective framework to determine when a dataset truly supports interpretable, replicable PFM.

View full thread

Cluster scanning is highly practical. Collecting 8 rapid scans takes less than 10 minutes, making it an easy addition to existing protocols. This enhanced precision could be a game-changer for development and aging studies, as well as getting faster signals in clinical trials

View full thread

The findings: We reliably detected expected differences in brain aging rates between younger and older adults, and those with cognitive impairment. That could not have been detected using standard approaches. We also discovered unexpected results...

We observed substantial, unexpected heterogeneity in brain aging over a single year. We captured atypical rapid global decline (in an individual who later developed MCI), asymmetric changes, and even remarkable brain maintenance. Check out the paper to see these case studies.

View full thread

We put this to the test by scanning individuals six times in just one year. We collected a total of 48 rapid scans per person, which allowed us to reliably capture longitudinal change fully within individuals.

Standard longitudinal MRI struggles to track individual trajectories of brain change over short periods because measurement error is often larger than the expected amount of true change. E.g., for the hippocampus, annual change is ~1-5%, but measurement error is 2-5%.

Max Elliott reposted

I am thrilled to share that I’ll be joining the University of Notre Dame (@notredame.bsky.social) as an Assistant Professor of Psychology this July!☘️🧠 Please reach out if you're interested in joining my lab! More details to follow soon.

I am recruiting a Postdoc to join my lab at UMN. If you or someone you know is interested in studying individual differences in brain and cognitive aging, check out the listing and my website in my bio and apply! I appreciate RTs to help get the word out as well :)

Do you want to estimate brain aging from a single MRI scan? Check out our latest work in Nature Aging "DunedinPACNI estimates the longitudinal Pace of Aging from a single brain image to track health and disease"

View full thread

Across several datasets, faster DunedinPACNI was associated with poor cognition, physical frailty, poor health, and worse cognitive status. Furthermore, faster DunedinPACNI predicted faster hippocampal atrophy, earlier onset of chronic disease, dementia, and mortality.

Most importantly, this is just the beginning! To estimate DunedinPACNI in your data, all you need is a single T1-weighted structural MRI and our publicly available tool. Please use it and share it widely! github.com/etw11/Dunedi...

github.comGitHub - etw11/DunedinPACNI: Code to estimate DunedinPACNI scores from FreeSurfer parcellations of brain MRI data.Code to estimate DunedinPACNI scores from FreeSurfer parcellations of brain MRI data. - etw11/DunedinPACNI

Do you want to estimate brain aging from a single MRI scan? Check out our latest work in Nature Aging "DunedinPACNI estimates the longitudinal Pace of Aging from a single brain image to track health and disease"

Building on the epigenetic clock and brain-age literatures, we built a "next-generation" brain aging clock by predicting an individual's rate of longitudinal biological aging from a single brain scan. We call our measure "DunedinPACNI"

Max Elliott reposted

Max Elliott reposted

View full thread

The high precision afforded by cluster scanning promises to accelerate clinical trials, lead to personalized biomarkers, and be a useful tool for the science of individual differences in brain development, aging, and disease. Check out the preprints for more details!

View full thread

Critically, this reduction in error allowed us to see changes in individuals within just one year. Here are hippocampal aging trajectories in 8 individuals across one year where you can see large individual differences and the benefits of pooling multiple measurements

This precision allowed us to see clear deviations from expected aging when they arose. In a striking example, we detected an aggressive atrophy trajectory in an individual who was cognitively unimpaired at baseline but then went on to develop an MCI diagnosis.

A key challenge for brain aging is to measure brain changes in individuals rather than group averages. This has huge implications for clinical trials, basic aging research and individual differences. However, we lack the precision needed to detect changes over short intervals.

We found a solution - cluster scanning. Utilizing the latest advances in scan acceleration we collected several short, 1-minute long T1s to drive to measurement error within individuals ... and it worked!

Max Elliott reposted

You are up to date.