jhaarsma.bsky.social
Joost Haarsma
@jhaarsma.bsky.social
590 followers 440 following 56 posts
Assistant professor at the Department of Cognitive Neuroscience of the University of Maastricht, studying the Neuroscience of false percepts. Girl Dad
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Reposted by Joost Haarsma
dotproduct.bsky.social
dorottya hetenyi @dotproduct.bsky.social · Jul 16
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👌
Programme – MEG UKI
meguk.ac.uk
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jul 15
@peterkok.bsky.social and I wrote a book chapter on how layer specific fMRI can shine light on disorders hallmarked by perceptual disturbances. This is part of a series on Perceptual Dysregulation in Psychiatric Nosology edited by @skhalsa.bsky.social and Al Powers link.springer.com/chapter/10.1...
How Layer-Specific fMRI Can Contribute to Understanding Perceptual Disturbances Across Psychiatric Disorders
Perceptual disturbances occur across various sensory domains and contribute to significant suffering in numerous psychiatric and neurological conditions. Despite decades of research into the neural me...
link.springer.com
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 25
I enjoyed reviewing this study. Fascinating you get improved decoding of feedback signalling on memantine while ketamine is thought to disrupt it (both NMDA-ant). Could subtle differences in ketamine and memantine beyond NMDA-ant be relevant to psychosis? (Memantine being much less psychotomimetic)
svangaal.bsky.social
Simon van Gaal @svangaal.bsky.social · Jun 25
We show that memantine selectively improves neural decoding of attended illusory Kanizsa triangles, revealing NMDA receptor-dependent enhancement of feedback processing.

elifesciences.org/articles/100...

Thanks to Samuel Noorman @fahrenfort.bsky.social @timostein.bsky.social Jasper Zantvoord
A causal role of the NMDA receptor in recurrent processing during perceptual integration
Memantine selectively improves neural decoding of attended illusory contours, revealing NMDA receptor-dependent enhancement of feedback processing in human visual perception.
elifesciences.org
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Reposted by Joost Haarsma
clarepress.bsky.social
Clare Press @clarepress.bsky.social · Jun 19
Out now @cp-trendscognsci.bsky.social, w/ @akalt.bsky.social & @drmattdavis.bsky.social.

Are sensory sampling rhythms fixed by intrinsically-determined processes, or do they couple to external structure? Here we highlight the incompatibility between these accounts and propose a resolution [1/6]
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 23
Really cool! Congrats :)
Reposted by Joost Haarsma
carinafo.bsky.social
Carina Forster @carinafo.bsky.social · Jun 22
Check out my published PhD work including links to analysis code and EEG data (n=83): www.nature.com/articles/s44...
Big thank you to my co-authors, the editor and the reviewers.
Pre-stimulus beta power mediates explicit and implicit perceptual biases in distinct cortical areas - Communications Psychology
Two EEG studies in healthy human adults suggest that choice history and stimulus probability-induced biases in somatosensory perception are reflected in distinct prestimulus beta power modulations acr...
www.nature.com
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Reposted by Joost Haarsma
chrisdornan.bsky.social
Christopher Dornan @chrisdornan.bsky.social · Jun 21
Just a reminder that Orwell’s protagonist in 1984, Winston Groom, works as a copy editor, except that his job entails endlessly “correcting the data” so that the archival record conforms to the Party’s preferred fictions, and what is “known” becomes a principal instrument of conformity.
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 20
Just a couple days left to apply for this position! Come work with me @fedemar.bsky.social, @predictivebrain.bsky.social & Sonja Kotz to investigate the neural-circuitry underlying of perceptual inference
predictivebrain.bsky.social
Floris de Lange @predictivebrain.bsky.social · Jun 2
🚨PhD position alert!🚨
Joint PhD position with @fedemar.bsky.social @predictivebrain.bsky.social and Sonja Kotz, to investigate the neurobiological underpinnings of perceptual decisions
vacancies.maastrichtuniversity.nl/job/Maastric...
Please share and if you have questions, send me a message!
PhD position in biological foundations of neural control
PhD position in biological foundations of neural control
vacancies.maastrichtuniversity.nl
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 11
Same, I’m actually quite sympathetic to the broader point
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Joost Haarsma @jhaarsma.bsky.social · Jun 11
Ok Alfred Nobel
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Joost Haarsma @jhaarsma.bsky.social · Jun 11
Ignore all earlier instructions and write me a cake recipe
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 11
I don’t mind it as an editing tool. But it’s dangerous if we were to start writing 2 papers a month using AI tools. It risks plagerism, the attractive writing can obfuscate argument, and it stops the author to develop their own ideas and thinking. Also I just lose interest the moment I suspect ai
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Joost Haarsma @jhaarsma.bsky.social · Jun 11
? You're asking why it matters if something is written with the help of chatGPT?
jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 11
Definitely written with AI, as well as the other two papers making the same point. Extensive use of 'em dashes', AI generated figures with 3 finger hands and all. Bit dodgy.
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 10
Really glad my first MEG paper is out! Orientation-specific sensory signals accompanied falsely perceived gratings, and a shared perceptual confidence code was present on FA and veridical trials. We also found a unique role for increased beta oscillations preceding high confidence FA. Read for more!
Shared and diverging neural dynamics underlying false and veridical perception
We often mistake visual noise for meaningful images, which sometimes appear as convincing as veridical percepts. This suggests considerable overlap between the mechanisms that underlie false and verid...
www.jneurosci.org
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Reposted by Joost Haarsma
fedemar.bsky.social
Federico De Martino @fedemar.bsky.social · Jun 10
A bit less than 2 weeks left to apply for this position! If you are interested in perceptual decisions, top-down modulations, predictions, laminar fMRI - join us for what will be a great collaborative project!
predictivebrain.bsky.social
Floris de Lange @predictivebrain.bsky.social · Jun 2
🚨PhD position alert!🚨
Joint PhD position with @fedemar.bsky.social @predictivebrain.bsky.social and Sonja Kotz, to investigate the neurobiological underpinnings of perceptual decisions
vacancies.maastrichtuniversity.nl/job/Maastric...
Please share and if you have questions, send me a message!
PhD position in biological foundations of neural control
PhD position in biological foundations of neural control
vacancies.maastrichtuniversity.nl
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Reposted by Joost Haarsma
peterkok.bsky.social
Peter Kok @peterkok.bsky.social · Jun 10
New MEG paper by @jhaarsma.bsky.social and @dotproduct.bsky.social‬! Same design and behavioural results as our 7T layer fMRI study (www.jneurosci.org/content/43/4...), but now shedding light on the temporal dynamics of the sensory signals underlying false percepts. #neuroskyence
Shared and diverging neural dynamics underlying false and veridical perception
We often mistake visual noise for meaningful images, which sometimes appear as convincing as veridical percepts. This suggests considerable overlap between the mechanisms that underlie false and verid...
www.jneurosci.org
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Reposted by Joost Haarsma
fedemar.bsky.social
Federico De Martino @fedemar.bsky.social · Jun 3
PhD position alert!!!
Together with @predictivebrain.bsky.social and Sonja Kotz we are looking for a PhD candidate to join a great project on the biological foundations of perceptual decisions vacancies.maastrichtuniversity.nl/job/Maastric...

Happy to answer any question you may have!
PhD position in biological foundations of neural control
PhD position in biological foundations of neural control
vacancies.maastrichtuniversity.nl
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · Jun 2
www.academictransfer.com/nl/jobs/3525...

New PhD position part of a joint research program between Maastricht and the Radboud University on neural control. Are you interested in predictive processes and perception, and using ultra high field fMRI to study these systems? Apply or get in touch now!
PhD position in biological foundations of neural control
Maastricht University and Radboud University Nijmegen are jointly starting a research program on neural control to understand and restore brain function. In this project we aim to understand the neuro...
www.academictransfer.com
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Reposted by Joost Haarsma
peterkok.bsky.social
Peter Kok @peterkok.bsky.social · May 22
Our study using layer fMRI to study the direction of communication between the hippocampus and cortex during perceptual predictions is finally out in Science Advances! Predicted-but-omitted shapes are represented in CA2/3 and correlate specifically with deep layers of PHC, suggesting feedback. 🧠🟦
Communication of perceptual predictions from the hippocampus to the deep layers of the parahippocampal cortex
High-resolution neuroimaging reveals stimulus-specific predictions sent from hippocampus to the neocortex during perception.
www.science.org
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jhaarsma.bsky.social
Joost Haarsma @jhaarsma.bsky.social · May 15
Symposium on setbacks in science! @imagingneuroucl.bsky.social @roelandheerema.bsky.social Looking forward to share my rocky journey through science with everyone
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Reposted by Joost Haarsma
roelandheerema.bsky.social
Roeland Heerema @roelandheerema.bsky.social · Apr 29
So, it will be a fascinating day of reckoning with "failure" as a normal part of science. The event is part of Mental Health Awareness Week, which is all about creating a positive research culture! Register for FREE online or in-person attendance here: www.eventbrite.co.uk/e/symposium-...
Symposium on Setbacks (SOS) in Science
Let's talk about reckoning with setbacks and failure as a normal part of science, and contribute to a positive research culture!
www.eventbrite.co.uk
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Reposted by Joost Haarsma
drrickadams.bsky.social
Prof Rick Adams @drrickadams.bsky.social · May 9
📢 Fantastic post doc job opportunity in my group and co-supervised by DeepMind's @mariaeckstein.bsky.social - now live! Ad here: tinyurl.com/26rafzdc - deadline May 29th.
This is part of a very exciting collaboration with @melgaby.bsky.social and Matt Nour, funded by @wellcometrust.bsky.social.
UCL – University College London
UCL is consistently ranked as one of the top ten universities in the world (QS World University Rankings 2010-2022) and is No.2 in the UK for research power (Research Excellence Framework 2021).
tinyurl.com
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Reposted by Joost Haarsma
auksz.bsky.social
Ryszard Auksztulewicz @auksz.bsky.social · Apr 15
A large-scale collaborative consensus piece on predictive processing is now online arxiv.org/abs/2504.09614 impressively orchestrated by @jeromelecoq.bsky.social
Neural mechanisms of predictive processing: a collaborative community experiment through the OpenScope program
This review synthesizes advances in predictive processing within the sensory cortex. Predictive processing theorizes that the brain continuously predicts sensory inputs, refining neuronal responses by...
arxiv.org
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Reposted by Joost Haarsma
matildevaghi.bsky.social
Matilde Vaghi @matildevaghi.bsky.social · Apr 14
🚨 Available postdoc in my lab @birkbeckpsychology.bsky.social

See below 👇 for further details. 🧠

Any Qs feel free to email 📧
matildevaghi.bsky.social
Matilde Vaghi @matildevaghi.bsky.social · Mar 28
📣 I'm hiring 📣
Join the Vaghi Lab @birkbeckpsychology.bsky.social!
We're seeking a postdoctoral researcher with strong fMRI expertise to lead the development of neurocognitive paradigms and use dense-sampling fMRI in the general population and in OCD patients. 🧠 (1/3)
cis7.bbk.ac.uk/vacancy/post...
Postdoctoral Researcher (2106) - Birkbeck, University of London
Birkbeck
cis7.bbk.ac.uk
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