Katharina Duecker

I have so many issues with this podcast with @earlkmiller.bsky.social . I think that this podcast nicely shows why I have trouble with such approaches. Lets go through some of the claims.

If you are at #SfN2025, come see me at my poster LBP022.7 on Sun 8-12 to talk about the next generation HNN that we have been working on over the past year 🧠🧪also check out our new updated website & textbook built by @asoplata.bsky.social & Dylan Daniels @hnnsolver.bsky.social

The Jones comp neuro lab is at #SfN25! Come check out our talks and posters to learn about our latest & greatest Science with HNN! All poster presentation times & locations can be found at jonescompneurolab.github.io/textbook/res...

Joyce Gao will present the application of HNN to simulate single pulse TMS evoked potentials. We show generative predictions for double pulse TMS and pharmacological modulations. Wed, Nov 19, 2025, 1 PM - 5 PM, PSTR478.08

Excited to share our preprint on variability in patch leaving decisions! Check out the 🧵 below

Rhythmic light stimulation elicits multiple concurrent neural responses that separably shape human perception Rhythmic light stimulation offers solutions to innumerable cognitive and neurological disorders. However, like any neuromodulatory technique, responses to rhythmic light stimulation are highly variabl...

Delighted to share our new preprint!

We show that rhythmic light stimulation produces multiplexed oscillatory responses at fundamental and harmonic frequencies that are spatially, temporally, and functionally distinct.

Read on for the details [1/6]

www.biorxiv.org/content/10.1...
#neuroskyence

Contents of visual predictions oscillate at alpha frequencies Predictions of future events have a major impact on how we process sensory signals. However, it remains unclear how the brain keeps predictions online in anticipation of future inputs. Here, we combin...

@dotproduct.bsky.social's first first author paper is finally out in @sfnjournals.bsky.social! Her findings show that content-specific predictions fluctuate with alpha frequencies, suggesting a more specific role for alpha oscillations than we may have thought. With @jhaarsma.bsky.social. 🧠🟦 🧠🤖

Fast hierarchical processing of orthographic and semantic parafoveal information during natural reading - Nature Communications Combining MEG, eye-tracking, and representational similarity analysis, this study shows that readers rapidly and sequentially extract orthographic and semantic information from upcoming words before fixation, supporting efficient reading.

Ever wonder how you read so fast? Your brain gets a head start—processing the next word before your eyes move. Our MEG + eye tracking study out in Nature Communications study from @thechbh.bsky.social reveals orthographic & semantic previews predicting reading speed www.nature.com/articles/s41...

And a huge thank you to my other co-authors: Kim Shapiro, Simon Hanslmayr, Jeremy Wolfe, Yali Pan, Aleksandra Pastuszak and of course @olejensen.bsky.social for bearing with me over the past many years!

If you have followed my work more or less closely you may remember that there was a previous version of this paper that did not account for t-o-t. A huge thank you to @benjamingriffiths.bsky.social & @ajquinn.bsky.social who helped with the GLM and pulled me out of my confound misery.

We hypothesized that high alpha power would be associated with reduced RIFT responses. However, we could not find a robust relationship between alpha power in the sensors showing the reaction time effect and RIFT. Maybe the effect is linked to holding the search template in VWM and not gain control?

What's more, comparison of the reaction time and time-on-task regressors suggest that the peak frequency and sensors driving the relationship may be different. We argue that this suggests two generators of alpha - one associated with search and one with fatigue/boredom!

We show that alpha power negatively correlates with RT - higher alpha, faster responses. There was no difference in hit rate between high and low alpha, so participants were indeed better at the task!

Guided visual search is associated with target boosting and distractor suppression in early visual cortex Communications Biology - Magnetoencephalography in human participants paired with Rapid Invisible Frequency Tagging reveals that excitability in early visual cortex is modulated to boost targets...

We analyzed data from our previous publication, where we showed that the RIFT signal is modulated in line with a priority map, to boost targets and suppress distractors. rdcu.be/eDbHY
Here, we fit a GLM-spectrum to the pre-search interval, accounting for confounds of alpha and RT with time-on-task.

At long last, the pre-print to our MEG study + RIFT study and the final paper from my Ph.D with @olejensen.bsky.social We show that strong pre-search alpha oscillations are associated with faster responses in visual search www.biorxiv.org/content/10.1...
@thechbh.bsky.social #neuroskyence

Hellohello again! Tomorrow at 5:15pm I’m giving a short talk on our latest MEG study about our very well-loved oscillating perceptual predictions @meguki2025.bsky.social. Come by and talk brains!
There are amazing talks and very cool science happening all around! MEGUKI 2025👌

Huge thank you to my co-authors Kim Shapiro, Simon Hanslmayr, Jeremy Wolfe, Yali Pan, @benjamingriffiths.bsky.social and the best PhD supervisor @olejensen.bsky.social for bearing with me over the past many years. There will be a part 2 so stay tuned :)

Finally out in @commsbio.nature.com !
Using MEG and Rapid Invisible Frequency Tagging (RIFT) in a classic visual search paradigm we show that neuronal excitability in V1 is modulated in line with a priority-map-based mechanism to boost targets and suppress distractors!

In the physical world, almost all information is transmitted through traveling waves -- why should it be any different in your neural network?

Super excited to share recent work with the brilliant @mozesjacobs.bsky.social: "Traveling Waves Integrate Spatial Information Through Time"

1/14

Most amazing piece of science communication by one talented @kermieeart.bsky.social :)

HNN Pre-Workshop Information Workshop Overview The Human Neocortical Neurosolver (HNN) is a user-friendly software tool for interpreting the cell and circuit level origin of human MEG and EEG signals. In this virtual event, we ...

We invite you to join us at our 2025 Spring Online Human Neocortical Neurosolver (HNN) Workshop! This workshop will be on Wednesday, April 9th from 9 AM - 3 PM (ET). Find out more and sign up 👉 tinyurl.com/hnn-workshop....
Seats are limited! #compneuro

If there is some science comm effort that tries to teach this I’d be happy to contribute. If not, I’d be happy to establish one! Potentially without a single host as the face of the show, but rather with many contributors. Would also reduce workload on the individual..

So critical! So many fitness, lifestyle & beauty influencers refer to papers to support their claims (also see Huberman’s success), but it takes years to learn how to read & understand a scientific paper. But this shows that there is a general interest in science and how it applies to our lives.

Thank you! I didn’t realize there was a thread on this exact question! :)

I thank taxpayers for supporting my lab's work. My group has helped map how brains transform "seeing" into "remembering". We've been working to transform what we've learned into a new treatment for individuals with memory impairment (by stimulating the vagus nerve).

www.nicolecrust.com/memory

Summer Workshop on the Dynamic Brain 2025 The Summer Workshop on the Dynamic Brain is an intensive, project-based residential course with a focus on the neurobiology of sensory processing, coding, and neural population dynamics.

Less than a week to apply for the Summer Workshop on the Dynamic Brain! 🐋🧠🌊

Apply by Feb. 1 to join us for this intensive, project-based residential course in the beautiful San Juan Islands.

🔗 alleninstitute.org/events/summe...

🧠📈

The Human Neocortical Neurosolver is on Bluesky! HNN is a user-friendly computational tool to develop & test hypotheses about the neural circuits underlying EEG/MEG signals. Our aim is to make comp neuro accessible to a broad community. Follow for HNN science, workshops & development! 🧠 👩‍🔬 #compneuro

Processes and measurements: a framework for understanding neural oscillations in field potentials Various neuroscientific theories maintain that brain oscillations are important for neuronal computation, but opposing views claim that these macroscale dynamics are ‘exhaust fumes’ of more relevant processes. Here, we approach the question of whether oscillations are functional or epiphenomenal by distinguishing between measurements and processes, and by reviewing whether causal or inferentially useful links exist between field potentials, electric fields, and neurobiological events. We introduce a vocabulary for the role of brain signals and their underlying processes, demarcating oscillations as a distinct entity where both processes and measurements can exhibit periodicity. Leveraging this distinction, we suggest that electric fields, oscillating or not, are causally and computationally relevant, and that field potential signals can carry information even without causality.

Our review on the theoretical status of oscillations and field potentials is out! What are their effects, and what can electrophysiology signals reveal about how the brain works?

w/ @dlevenstein.bsky.social @prokraustinator.bsky.social Bradley Voytek @rdgao.bsky.social

www.cell.com/trends/cogni...

So I think gamma flicker response ≠ grating-induced gamma ≠ memory gamma ≠ evoked gamma. Probably all emerging from different neural circuits. Personally, I don’t know why it’s so important that the Alzheimer’s effects underlie oscillatory entrainment. Still compelling that the brain likes 40 Hz.

Imperceptible gamma-band sensory stimulation enhances episodic memory retrieval Enhanced gamma activity (30-100Hz) coincides with the successful recall of episodic memories, but it remains unknown whether this oscillatory activity is a cause or a consequence of the retrieval proc...

There is a concern about whether gamma flicker does propagate beyond V1 @mariusschneider.bsky.social but Ben Griffiths has found some effects of gamma flicker on memory performance www.biorxiv.org/content/10.1...