Pieter Barkema

Hellohello #ICON2025! Please come and have a chat with me today at 10.45am about some content-specific alpha fluctuations! 🤓

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.

Go attend @dotproduct.bsky.social's talk about oscillating predictions in the visual cortex tomorrow afternoon! @meguki2025.bsky.social #neuroskyence

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]

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

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...

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

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.

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."

🚨 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!

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.

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. 🧠🟦

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

Woohoo! Excited to finally share our findings with the world!

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.

So cool Sam!! Important, in-touch and inspiring science.