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Pieter Barkema

@pieterbarkema.bsky.social
85 followers 82 following 13 posts

Doing PhD in Neuroscience of Perception @ FIL (UCL) Developer of PCNportal for individual (normative) brain modelling: pcnportal.dccn.nl.

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Pieter Barkema @pieterbarkema.bsky.social · 11/09/2026
What you see right now is not a livestream, but is delayed & edited by your brain 🧠. The brain uses a short time buffer to rewrite what you thought you saw using info that comes in later (postdiction). We study how (7T fMRI, retinotopy). Read our preprint: www.biorxiv.org/content/10.6... 👀 (1/N)
biorxiv.org
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Reposted by Pieter Barkema
dorottya hetenyi @dotproduct.bsky.social · 19/09/2025
Hellohello #ICON2025! Please come and have a chat with me today at 10.45am about some content-specific alpha fluctuations! 🤓
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Pieter Barkema @pieterbarkema.bsky.social · 13/08/2025
Are you at CCN? Come check out our poster on how the brain does postdiction (post-hoc perception). We have multisensory illusions, retinotopy and 7T layer fMRI! Spoiler: visual cortex does more than you think. Friday 2:00-5:00. Poster C111. With @peterkok.bsky.social and @jhaarsma.bsky.social.
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Peter Kok @peterkok.bsky.social · 16/07/2025
Go attend @dotproduct.bsky.social's talk about oscillating predictions in the visual cortex tomorrow afternoon! @meguki2025.bsky.social #neuroskyence
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Clare Press @clarepress.bsky.social · 19/06/2025
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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Peter Zeidman @corticalpete.bsky.social · 23/06/2025
The beta release of SPM-Python is out now! Amazing work by Johan Medrano @johmedr.bsky.social , Yael Balbastre, Yulia Bezsudnova @ybezs.bsky.social and other members of their team. A new era for SPM! #OHBM2025
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Peter Kok @peterkok.bsky.social · 10/06/2025
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
jneurosci.org
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...
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Reposted by Pieter Barkema
UCL Faculty of Brain Sciences @uclbrainscience.bsky.social · 09/06/2025
New research from @uclqsion.bsky.social‬ reveals how our brains predict what we’re about to see—before it even happens. Senior author Prof @peterkok.bsky.social‬ said: "This predictive function may be essential not only for perception but for decision-making and learning."
buff.ly
Researchers reveal how our brains predict what we’re about to see
Researchers in the UCL Queen Square Institute of Neurology find that the hippocampus sends signals to the visual cortex to predict what we are about to see.
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Yulia Bezsudnova @ybezs.bsky.social · 19/05/2025
🚨 MEG-UKI abstract submission is closing soon! 🚨 If you're an ECR who hasn’t yet had the chance to present your PhD work in full, and it deserves the spotlight, we’re offering 20-minute keynote-style talks. Don’t miss this opportunity to share your important research!
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Peter Kok @peterkok.bsky.social · 22/05/2025
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. 🧠🟦
science.org
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.
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dorottya hetenyi @dotproduct.bsky.social · 17/05/2025
This was looooads of fun! Thank you so much everyone for the amazing and interesting chats.🫶 Also @pieterbarkema.bsky.social has a very cool talk on Monday @ 11.15am on some yummy layer-specific fMRI of postdictive perception.🙀 #VSS2025
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Pieter Barkema @pieterbarkema.bsky.social · 18/05/2025
Reposting for all my 7 loyal followers. Come see our cool results on visual cortex encoding perception even when it is constructed in hindsight! Monday morning in the Multisensory Session at 10:45 - 12:15 - 3rd speaker.
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