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Jason da Silva Castanheira @jasondasilvac.bsky.social · 13d

It does not, however, speak to the origins of the 1/f. I agree that many mechanisms could produce the same spectrum. More work is needed to clarify these neural mechanisms.

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Jason da Silva Castanheira @jasondasilvac.bsky.social · 13d

This is a great question! Our paper is grounded in the 'specparam' framework and aims to test whether current approaches yield biased and/or correlated estimates of spectral parameters. I think this is an important question given the widespread use of these methods.

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Jason da Silva Castanheira @jasondasilvac.bsky.social · 13d

Using an empirical dataset, we show that analytical choice in quantifying brain rhythms impacts the interpretation of your results! 😰 Lastly, we find that resting state alpha power and arrhythmic slope are positively correlated at rest, which dovetails with the cortical inhibition account.

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Jason da Silva Castanheira @jasondasilvac.bsky.social · 13d

We show that spectral detrending methods produce biased estimates of rhythmic power that introduce spurious correlations between brain rhythms and arrhythmic brain activity. Modelled Gaussian power, on the other hand, does not. 🤯

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Jason da Silva Castanheira @jasondasilvac.bsky.social · 13d

Brain rhythms are important! 🚨Peristimulus alpha power predicts participants’ subjective experience. 👀 Arrhythmic brain activity is equally important! Both are theorized to be markers of cortical inhibition⚡️. But can we measure the two independently of one another with our current tools?

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Jason da Silva Castanheira @jasondasilvac.bsky.social · 13d

Quantifying rhythmic and arrhythmic brain activity is a hot 🥵 topic. But how independent are the two components from one another? 🤔 In my latest work with @smfleming.bsky.social & @matlandry.bsky.social, I explore the relationship between the two.

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Quantifying Rhythmic and Arrhythmic Components of Brain Activity

Brain activity comprises both rhythmic (periodic) and arrhythmic (aperiodic) components. These signal elements vary across healthy aging, and disease, and may make distinct contributions to conscious ...

www.biorxiv.org

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Reposted by Jason da Silva Castanheira

Sylvain Baillet @sylvainbaillet.bsky.social · 28d

New study ✨!
⍺ regulates perceptual switches during binocular rivalry:
⍺↓ before dominant percepts, ↑ before mixed percepts + PO connectivity shifts from top-down to feedforward after perceptual alternations
Led by Janine Mendola @mcgill.ca, w/ E Mokri & @jasondasilvac.bsky.social

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Jason da Silva Castanheira @jasondasilvac.bsky.social · 28d

🚨The first paper of my postdoc is out now in @elife.bsky.social! 🚨 We explored the role of attention in planning. Thank you 🙏 to the reviewers for their helpful comments & suggestions. Keep your 👀 peeled for additional analyses and our response. elifesciences.org/reviewed-pre...

How attention simplifies mental representations for planning

elifesciences.org

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Reposted by Jason da Silva Castanheira

Steven Scholte @neurosteven.bsky.social · Sep 8

🧠 New preprint: Why do deep neural networks predict brain responses so well?
We find a striking dissociation: it’s not shared object recognition. Alignment is driven by sensitivity to texture-like local statistics.
📊 Study: n=57, 624k trials, 5 models doi.org/10.1101/2025...

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Reposted by Jason da Silva Castanheira

Nadine Dijkstra @nadinedijkstra.bsky.social · Jul 23

After five years of confused staring at Greek letters, it is my absolute pleasure to finally share our (with @smfleming.bsky.social) computational model of mental imagery and reality monitoring: Perceptual Reality Monitoring as Higher-Order inference on Sensory Precision ✨
osf.io/preprints/ps...

OSF

osf.io

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Jason da Silva Castanheira @jasondasilvac.bsky.social · Jul 24

Very proud to share this one🥹! We show that personalized signatures of brain activity are heritable and relate to the expression of specific genes. That means my brain-fingerprint is very similar to my twin brother's! #ResearchIsMeSearch🧠 🧬 ♊️

Genetic foundations of interindividual neurophysiological variability

Individual brain activity profiles are shaped by lifelong genetic influences.

www.science.org

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Reposted by Jason da Silva Castanheira

Sylvain Baillet @sylvainbaillet.bsky.social · Jul 23

🧬🧠 Our latest study shows that individual brain dynamics are partly written in our genes. We found that heritable neurophysiological traits align with adult cortical gene expression and psychological function.

www.science.org/doi/10.1126/...

@theneuro.bsky.social @mcgill.ca

Genetic foundations of interindividual neurophysiological variability

Individual brain activity profiles are shaped by lifelong genetic influences.

www.science.org

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Reposted by Jason da Silva Castanheira

Nature Human Behaviour @nathumbehav.nature.com · May 28

Collecting an extensive publicly available dataset on 4 inhibitory control tasks, Lee et al. show that more than 1000 trials/participant are necessary to reduce within-subject variability and improve the reliability of the congruency effect.
www.nature.com/articles/s41...

Precise individual measures of inhibitory control - Nature Human Behaviour

Collecting an extensive publicly available dataset on four inhibitory control tasks, Gratton et al. show that more than 1,000 trials per participant are necessary to reduce within-participant variabil...

www.nature.com

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Jason da Silva Castanheira @jasondasilvac.bsky.social · May 22

🚨Excited to share my first preprint from my postdoc with @smfleming.bsky.social! 🚨 We explore how attention shapes simplified mental representations for planning. We show that inductive biases characteristic of attentional selection shape how we plan. Check it out: osf.io/preprints/ps... 🧠🔦🤖

OSF

osf.io

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Reposted by Jason da Silva Castanheira

MEGUKI 2025 @meguki2025.bsky.social · May 12

Want to present at MEG-UKI but funding is a barrier?

We’re offering a limited amount of travel bursaries for presenters to help cover the cost of:
- Registration
- Accommodation
- Travel expenses

Click the link below to find out more:
meguk.ac.uk/apply-for-bu...

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Reposted by Jason da Silva Castanheira

MEGUKI 2025 @meguki2025.bsky.social · May 19

Deadline approaching, only 6 days left!

Follow the link below to submit your abstract:
meguk.ac.uk/abstract-sub...

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Reposted by Jason da Silva Castanheira

MEGUKI 2025 @meguki2025.bsky.social · May 6

Drumroll please... 🥁

Abstract submission for MEG-UKI 2025 is now open!!!
All the details can be found meguk.ac.uk/meg-uki-2025/

We are looking forward to welcoming you to London!

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Jason da Silva Castanheira @jasondasilvac.bsky.social · Nov 28

-Sensorimotor cortices 🏋️‍♀️🚴‍♀️ become increasingly prominent for differentiating individuals across neurodevelopment and aging.
-These changes become increasingly aligned with cortical gene expression🧬.

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Jason da Silva Castanheira @jasondasilvac.bsky.social · Nov 28

We analyzed resting-state MEG from over 1000 individuals between the ages of 4 and 89:
-children are harder to differentiate from one another 👯‍♂️ based on arrhythmic brain activity. 🧠
- rhythmic activity remains a reliable marker of individuality across all ages🌈.

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Jason da Silva Castanheira @jasondasilvac.bsky.social · Nov 28

How do neurophysiological traits that characterize individuals evolve across the lifespan? Check it out: 👶🧒🧑🧓🧠

with the amazing @sylvainbaillet.bsky.social @alexwiesman.bsky.social & Margot Taylor

www.biorxiv.org/content/10.1...

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The Lifespan Evolution of Individualized Neurophysiological Traits

How do neurophysiological traits that characterize individuals evolve across the lifespan? To address this question, we analyzed brief, task-free magnetoencephalographic recordings from over 1,000 ind...

www.biorxiv.org

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Reposted by Jason da Silva Castanheira

Alex Wiesman @alexwiesman.bsky.social · Feb 21

New preprint! 📢

We combine MEG and neuromelanin-sensitive MRI of the locus coeruleus to show a noradrenergic basis for altered alpha rhythms in #Parkinson's disease

w/ Victoria Madge, Ted Fon, Alain Dagher, Louis Collins, and @sylvainbaillet.bsky.social

www.medrxiv.org/content/10.1...

Scientific figure demonstrating the spatial alignment between a normative atlas of norepinephrine transporter densities (x-axis; lower maps to the right) and the relationship between cortical alpha rhythms and locus coeruleus integrity (y-axis; higher maps to the right).

The association between locus coeruleus degeneration and pathological alpha-rhythmic increases was strongest in cortical regions sensitive to norepinephrine (r = -.65, pSPIN < .001).

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Reposted by Jason da Silva Castanheira

Sylvain Baillet @sylvainbaillet.bsky.social · Feb 9

Congrats to newly minted Dr. Jason da Silva Castanheira! @jasondasilvac.bsky.social
🧑‍🎓!!!

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Jason da Silva Castanheira @jasondasilvac.bsky.social · Feb 8

As if my name isn’t long enough already, I added PhD to it today!

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Reposted by Jason da Silva Castanheira

Steve Fleming @smfleming.bsky.social · Jan 29

We are recruiting for a Marie Curie "CODE" PhD student 💻🧠🚨 (sites.google.com/view/confide...)

The project will focus on neurocomputational approaches to information seeking, offloading and metacognitive control across the lifespan

www.ucl.ac.uk/work-at-ucl/...

Deadline 22 Feb, pls share!

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Reposted by Jason da Silva Castanheira

Alex Wiesman @alexwiesman.bsky.social · Jan 15

New paper(!) on the neurochemistry of structural and functional cortical changes in #Parkinson's disease

w/ fantastic collaborators @jasondasilvac.bsky.social Ted Fon and @sylvainbaillet.bsky.social

Now published OA in @ANA_journals:
📰https://doi.org/10.1002/ana.26871

🧵👇
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