tor

tor

@torwager.bsky.social

Professor of Psychological and Brain Sciences at Dartmouth College

939 followers467 following99 posts

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No subregions were affected by cognitive reappraisal. Amygdala responses are quite “bottom up” in this community sample of >350 participants.

A new data-driven clustering subdivides the amygdala based on the time-course of evoked responses. The Amunts BLA divides into two clusters with different temporal profiles and evoked response magnitudes. Subregion masks available on Github here: github.com/canlab/Neur...

Different amygdala subregions have different evoked responses to aversive images. Lateral basal and superficial regions peak earlier, whereas centromedial amygdala showed later, more sustained responses, perhaps reflecting greater integration of affect-related brain processes.

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Excited that this paper, "Highly replicable multisite patterns of adolescent white matter maturation", has now been published in Neuron! It may be found at cell.com/neuron/fullt.... To freely access the paper for the next 50 days, please use this link: authors.elsevier.com/c/1nxdd3BtfH...

cell.comHighly replicable multisite patterns of adolescent white matter maturationMeisler et al. present a large public resource of fully processed diffusion MRI from the ABCD study and show that advanced diffusion measures and longitudinal harmonization improve the replicability a...
Steven Meisler@stevenmeisler.com

Diffusion MRI (dMRI) is a powerful tool to study white matter maturation. In our new preprint, we process and distribute a new resource of >24,000 ABCD dMRI scans using open source tools! We then evaluate how methods shape inferences about development. 🔗 www.biorxiv.org/content/10.6...

I've been exploring the landscape of mind–body programs for chronic pain, fatigue and related conditions. The result: a Mind–Body Program Atlas, an interactive, AI-assisted survey of 74 programs. A few things it makes visible… Thread below 👇

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This is an exploratory, AI-assisted survey, with separate research and fact-checking passes. It favors English-language, online-visible programs. Reach estimates are especially uncertain. I hope it helps make this growing landscape easier to examine.

I've been exploring the landscape of mind–body programs for chronic pain, fatigue and related conditions. The result: a Mind–Body Program Atlas, an interactive, AI-assisted survey of 74 programs. A few things it makes visible… Thread below 👇

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Scale changes the picture. The log-compressed timeline makes smaller programs visible; the relative-share view highlights the estimated reach of meditation apps. These are rough reconstructions of engagement, not measured prevalence or treatment success.

Evidence needs a separate look. The atlas includes trial summaries, costs and clinical adoption. Its evidence labels describe how much research exists, not whether results show benefit. Multiple trials can still have mixed or null primary outcomes.

I've been exploring the landscape of mind–body programs for chronic pain, fatigue and related conditions. The result: a Mind–Body Program Atlas, an interactive, AI-assisted survey of 74 programs. A few things it makes visible… Thread below 👇

Many newer programs draw on older traditions: meditation, hypnosis, stress physiology, conditioning and pain science. The Roots view maps these proposed connections. Different names and histories can lead to overlapping ideas and practices.

The Mechanisms view groups programs by their explanations of illness: threat and learning, attention, emotion, autonomic regulation and more. These are the programs' stated theories. Shared language does not establish a shared cause—or validate a mechanism.

A new fMRI study just out on precision functional mapping of imagined and experienced pain, led by Michael Sun (Sun et al., 2026, Nature Communications). How strongly does imagining pain activate nociceptive representations in the brain? doi.org/10.1038/s41... Thread below 👇

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A useful distinction for thinking about empathy, planning, and chronic pain...with more to test. This was a small, intensively studied sample of healthy adults, without trial-by-trial imagery ratings. Generalization to chronic pain remains an open question.

A new fMRI study just out on precision functional mapping of imagined and experienced pain, led by Michael Sun (Sun et al., 2026, Nature Communications). How strongly does imagining pain activate nociceptive representations in the brain? doi.org/10.1038/s41... Thread below 👇

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Individualized pain representations responded to pain > warm, pain > rest, and were body-site specific on independent test days. We id'd pain reps in posterior insula, S1, S2, & more. Imagining pain did not reliably reactivate any of these these body-site-selective nociceptive patterns.

But nociceptive representations are not the end of the story. RSA analyses showed that imagination did produce distributed pain-like patterns, esp. in transmodal association regions. These may help anticipate & prepare for pain, while preserving a distinction between imagination and experience.

A new fMRI study just out on precision functional mapping of imagined and experienced pain, led by Michael Sun (Sun et al., 2026, Nature Communications). How strongly does imagining pain activate nociceptive representations in the brain? doi.org/10.1038/s41... Thread below 👇

We scanned 9 participants on 10 separate days, with stimulation on 8 body sites. We compared painful heat, non-painful warmth, and imagined pain, identifying individualized patterns and testing them on independent scan days.

Imagined and experienced pain activated some common regions, including insula & premotor cortex. Both also activated an inferior inter-effector M1 region. Looking back, we found the same inter-effector region in previous pain signatures! But overlapping activation need not mean the same neural code.

tor reposted

“I see a superheated Earth. Add the Asian heat waves that broke 122 in Xinjiang, China, and “boiled” potatoes in the ground in S Korea, and there’s no getting around the fact that we are now living in the future that climate scientists have been warning us about.” www.nytimes.com/2026/10/12/o...

nytimes.comOpinion | Wildfires Are Unfightable NowThis year’s fast moving, virtually irrepressible wildfire events are not the seasonal burns of decades past.
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Casella and Berger's book, Statistical Inference, has an awesome flowchart that inspired me. I thought it would be neat if they were interactive -- you could change the parameters of a gamma distribution and see what happens...

There are 15 core distributions, and an extended map of 32 distributions. Clicking the distribution gives you an interactive graph, and clicking a link between two of them explains the relationship.

I've always wanted a compact description of probability distributions, what they are used for, and how they are inter-related. Where does the chi-squared distribution come from? I learned about some in graduate school, but most I had never worked with.

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Really great resource if you’re interested in placebo and nocebo research!

tor@torwager.bsky.social

Launching scienceofplacebo.org: a living bibliography of placebo and nocebo research. New papers screened & tagged daily by design, population, outcome and findings, with a searchable database (currently about 5,000 papers), an interactive researcher map, events, news and discussion.

tor reposted

Shout-out to @torwager.bsky.social and the CAN Lab, who created this amazing resource for all #placebo researchers! 💊 Check it out: scienceofplacebo.org

tor@torwager.bsky.social

Launching scienceofplacebo.org: a living bibliography of placebo and nocebo research. New papers screened & tagged daily by design, population, outcome and findings, with a searchable database (currently about 5,000 papers), an interactive researcher map, events, news and discussion.

I am updating a talk. Every time i do this, i spend hours searching for that one slide I made two years ago that illustrates a specific point... I have a lot of slide decks (398 decks since 2024 - gulp!) and it's getting harder. With #astra I built a searchable index.

The kinds of things we can do with #astra and #Fable5 are amazing. Lowering the overhead to building allows new kinds of creativity.