Peter Kok
@peterkok.bsky.social
Professor of Cognitive Neuroscience at the FIL, UCL, using human neuroimaging to study how our prior knowledge influences the way we perceive the world. https://www.fil.ion.ucl.ac.uk/team/visual-perception-team/
Pinned
Peter Kok
@peterkok.bsky.social
· Oct 21
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...
www.jneurosci.org
@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. 🧠🟦 🧠🤖
Far fewer people want to live here - success! www.bbc.co.uk/news/article...
UK net migration falls sharply with drop in arrivals for work and study
Provisional figures for net migration to the UK show levels dropped to 204,000 in the year to June 2025.
www.bbc.co.uk
November 27, 2025 at 6:44 PM
Far fewer people want to live here - success! www.bbc.co.uk/news/article...
Reposted by Peter Kok
Join the We Ain't Buying it campaign, don't shop at Trump enablers Target, Home Depot, or Amazon 11/27 - 12/1.
indivisible.org/campaign/we-...
www.theguardian.com/us-news/2025...
indivisible.org/campaign/we-...
www.theguardian.com/us-news/2025...
What is the latest Black Friday boycott – and will it work?
While others scramble for deals on Black Friday and Cyber Monday, activists hope to leverage shopping behavior for societal change
www.theguardian.com
November 24, 2025 at 5:36 PM
Join the We Ain't Buying it campaign, don't shop at Trump enablers Target, Home Depot, or Amazon 11/27 - 12/1.
indivisible.org/campaign/we-...
www.theguardian.com/us-news/2025...
indivisible.org/campaign/we-...
www.theguardian.com/us-news/2025...
Reposted by Peter Kok
They did it again! NYC subway Thanksgiving 2025, via @scootercaster.com!
November 27, 2025 at 4:19 PM
They did it again! NYC subway Thanksgiving 2025, via @scootercaster.com!
Great study by @lunahuestegge.bsky.social and @nadinedijkstra.bsky.social using TMS to investigate the causal role of early visual cortex in imagery-induced false percepts.
I am very excited to share our new preprint, spearheaded by the brilliant @lunahuestegge.bsky.social, w/ @peterkok.bsky.social and others: ‘An attempt to push mental imagery over the reality threshold using non-invasive brain stimulation’
doi.org/10.31234/osf...
doi.org/10.31234/osf...
OSF
doi.org
November 27, 2025 at 11:18 AM
Great study by @lunahuestegge.bsky.social and @nadinedijkstra.bsky.social using TMS to investigate the causal role of early visual cortex in imagery-induced false percepts.
Reposted by Peter Kok
Today we’ll get latest net immigration figures - They’ll show immigration for work is plummeting.
Why is this not part of the discussion on Rachel Reeves balancing her books & stalled growth?
For every 100,000 drop in net immigration, the OBR adds £7bn to the deficit. #r4today
Why is this not part of the discussion on Rachel Reeves balancing her books & stalled growth?
For every 100,000 drop in net immigration, the OBR adds £7bn to the deficit. #r4today
November 27, 2025 at 8:41 AM
Today we’ll get latest net immigration figures - They’ll show immigration for work is plummeting.
Why is this not part of the discussion on Rachel Reeves balancing her books & stalled growth?
For every 100,000 drop in net immigration, the OBR adds £7bn to the deficit. #r4today
Why is this not part of the discussion on Rachel Reeves balancing her books & stalled growth?
For every 100,000 drop in net immigration, the OBR adds £7bn to the deficit. #r4today
Reposted by Peter Kok
Terrific work led by @emmaroscow.bsky.social showing that hippocampal replay reflects events with large prediction errors, all the better to bootstrap learning as we slumber
Congratulations to Matt Jones & Nathan Lepora for seeing this through to the end!
www.nature.com/articles/s41...
Congratulations to Matt Jones & Nathan Lepora for seeing this through to the end!
www.nature.com/articles/s41...
Post-learning replay of hippocampal-striatal activity is biased by reward-prediction signals - Nature Communications
It is unclear which aspects of experience shape sleep’s contributions to learning. Here, by combining neural recordings in rats with reinforcement learning, the authors show that reward-prediction sig...
www.nature.com
November 27, 2025 at 10:24 AM
Terrific work led by @emmaroscow.bsky.social showing that hippocampal replay reflects events with large prediction errors, all the better to bootstrap learning as we slumber
Congratulations to Matt Jones & Nathan Lepora for seeing this through to the end!
www.nature.com/articles/s41...
Congratulations to Matt Jones & Nathan Lepora for seeing this through to the end!
www.nature.com/articles/s41...
Reposted by Peter Kok
The war will end when Russia stops fighting. Therefore, pressure has to be put on Russia, so that they stop believing that they will win. Why is that so hard to understand?
November 27, 2025 at 1:49 AM
The war will end when Russia stops fighting. Therefore, pressure has to be put on Russia, so that they stop believing that they will win. Why is that so hard to understand?
Reposted by Peter Kok
“...the editors are all working scientists & so they understand the process.... they are able to not only ensure there is a fair & rapid review, but they can also evaluate the reviews that you get.” Linda Overstreet-Wadiche explains 1 of the many reasons to submit to #JNeurosci
November 20, 2025 at 11:34 PM
“...the editors are all working scientists & so they understand the process.... they are able to not only ensure there is a fair & rapid review, but they can also evaluate the reviews that you get.” Linda Overstreet-Wadiche explains 1 of the many reasons to submit to #JNeurosci
Reposted by Peter Kok
Matchday!
Last midweek home game of the season 🙁
Last midweek home game of the season 🙁
🏆 Next Men's First Team match 🏆
Wednesday night East London derby cup tie 🔥
📍 Old Spotted Dog Ground, E7 9NP
🚇 Forest Gate, Wanstead Park + 5 other stations nearby
🎟️ £5 | pay what you can concessions | free U13s
🍻 Bar, Fusion Food
www.claptoncfc.co.uk/2025/11/24/m...
Wednesday night East London derby cup tie 🔥
📍 Old Spotted Dog Ground, E7 9NP
🚇 Forest Gate, Wanstead Park + 5 other stations nearby
🎟️ £5 | pay what you can concessions | free U13s
🍻 Bar, Fusion Food
www.claptoncfc.co.uk/2025/11/24/m...
November 26, 2025 at 11:04 AM
Matchday!
Last midweek home game of the season 🙁
Last midweek home game of the season 🙁
Reposted by Peter Kok
A small but significant step: Dutch national broadcaster NOS is leaving X.
“The volume of hateful comments and disinformation on X is enormous and flows freely. This also applies under our own posts, meaning we unintentionally contribute to their spread”
over.nos.nl/nieuws/nos-p...
“The volume of hateful comments and disinformation on X is enormous and flows freely. This also applies under our own posts, meaning we unintentionally contribute to their spread”
over.nos.nl/nieuws/nos-p...
NOS plaatst vanaf vandaag geen nieuwsberichten meer op X - Over NOS
De NOS en Nieuwsuur (NOS/NTR) zijn gestopt met posten op X. Het platform past niet meer bij onze visie op...
over.nos.nl
November 25, 2025 at 11:13 AM
A small but significant step: Dutch national broadcaster NOS is leaving X.
“The volume of hateful comments and disinformation on X is enormous and flows freely. This also applies under our own posts, meaning we unintentionally contribute to their spread”
over.nos.nl/nieuws/nos-p...
“The volume of hateful comments and disinformation on X is enormous and flows freely. This also applies under our own posts, meaning we unintentionally contribute to their spread”
over.nos.nl/nieuws/nos-p...
Reposted by Peter Kok
the price of populism
"By 2025, Brexit had reduced UK GDP by 6% to 8%, with the impact accumulating gradually over time. We estimate that investment was reduced by between 12% and 18%, employment by 3% to 4% and productivity by 3% to 4%"
Read the Stanford report:
siepr.stanford.edu/publications...
Read the Stanford report:
siepr.stanford.edu/publications...
The Economic Impact of Brexit
Other
siepr.stanford.edu
November 25, 2025 at 7:43 PM
the price of populism
You’ve been kidnapped. The characters from the last TV show you watched are trying to rescue you. Who’s coming to save you?
November 25, 2025 at 8:51 PM
You’ve been kidnapped. The characters from the last TV show you watched are trying to rescue you. Who’s coming to save you?
Reposted by Peter Kok
Every machine in a Hospital that diagnoses your body without cutting you open is based on a principle of Physics, discovered by a Physicist who had no interest in Medicine.
If you think the world doesn’t need Basic Science, or that somehow Science has failed you, think again.
#sciencematters
If you think the world doesn’t need Basic Science, or that somehow Science has failed you, think again.
#sciencematters
November 25, 2025 at 1:40 AM
Every machine in a Hospital that diagnoses your body without cutting you open is based on a principle of Physics, discovered by a Physicist who had no interest in Medicine.
If you think the world doesn’t need Basic Science, or that somehow Science has failed you, think again.
#sciencematters
If you think the world doesn’t need Basic Science, or that somehow Science has failed you, think again.
#sciencematters
Reposted by Peter Kok
New paper: Transcranial Focused Ultrasound for Identifying the Neural Substrate of Conscious Perception. With Dan Freeman, @brianodegaard.bsky.social, and Seung-Schik Yoo. www.sciencedirect.com/science/arti...
Transcranial Focused Ultrasound for Identifying the Neural Substrate of Conscious Perception
Identifying what aspects of brain activity are responsible for conscious perception remains one of the most challenging problems in science. While pro…
www.sciencedirect.com
November 22, 2025 at 4:03 PM
New paper: Transcranial Focused Ultrasound for Identifying the Neural Substrate of Conscious Perception. With Dan Freeman, @brianodegaard.bsky.social, and Seung-Schik Yoo. www.sciencedirect.com/science/arti...
Reposted by Peter Kok
"we found that psilocybin altered a fundamental computational building block of contextual processing in the human brain: divisive normalization, particularly in the form of visual surround suppression"
#neuroskyence 🧠
#neuroskyence 🧠
Our new paper is out in Nature Communications! nature.com/articles/s41...
We combined psychophysics, 7T fMRI, and computational modeling of vision with placebo, 5mg, and 10mg psilocybin, in the same group of participants, to clarify the computational mechanisms of psychedelics. 🧵
We combined psychophysics, 7T fMRI, and computational modeling of vision with placebo, 5mg, and 10mg psilocybin, in the same group of participants, to clarify the computational mechanisms of psychedelics. 🧵
November 24, 2025 at 8:13 PM
"we found that psilocybin altered a fundamental computational building block of contextual processing in the human brain: divisive normalization, particularly in the form of visual surround suppression"
#neuroskyence 🧠
#neuroskyence 🧠
Reposted by Peter Kok
** Recruiting a postdoc ** We are looking for a postdoc to work on emotion, mental health, and interoception, based in London at @ucl.ac.uk in my lab (Clinical and Affective Neuroscience). Part of a large Wellcome Grant (co-led with the brilliant @camillanord.bsky.social)
November 24, 2025 at 12:22 PM
** Recruiting a postdoc ** We are looking for a postdoc to work on emotion, mental health, and interoception, based in London at @ucl.ac.uk in my lab (Clinical and Affective Neuroscience). Part of a large Wellcome Grant (co-led with the brilliant @camillanord.bsky.social)
Reposted by Peter Kok
Our new paper is out in Nature Communications! nature.com/articles/s41...
We combined psychophysics, 7T fMRI, and computational modeling of vision with placebo, 5mg, and 10mg psilocybin, in the same group of participants, to clarify the computational mechanisms of psychedelics. 🧵
We combined psychophysics, 7T fMRI, and computational modeling of vision with placebo, 5mg, and 10mg psilocybin, in the same group of participants, to clarify the computational mechanisms of psychedelics. 🧵
November 23, 2025 at 10:26 PM
Our new paper is out in Nature Communications! nature.com/articles/s41...
We combined psychophysics, 7T fMRI, and computational modeling of vision with placebo, 5mg, and 10mg psilocybin, in the same group of participants, to clarify the computational mechanisms of psychedelics. 🧵
We combined psychophysics, 7T fMRI, and computational modeling of vision with placebo, 5mg, and 10mg psilocybin, in the same group of participants, to clarify the computational mechanisms of psychedelics. 🧵
Reposted by Peter Kok
90+4' Full time
Clapton CFC 3 Richmond and Kew 0
Not loads of clear cut chances in the second half. CCFC seemed in control, but it needed the 3rd goal to feel comfortable. A good performance all round
Clapton CFC 3 Richmond and Kew 0
Not loads of clear cut chances in the second half. CCFC seemed in control, but it needed the 3rd goal to feel comfortable. A good performance all round
November 23, 2025 at 3:58 PM
90+4' Full time
Clapton CFC 3 Richmond and Kew 0
Not loads of clear cut chances in the second half. CCFC seemed in control, but it needed the 3rd goal to feel comfortable. A good performance all round
Clapton CFC 3 Richmond and Kew 0
Not loads of clear cut chances in the second half. CCFC seemed in control, but it needed the 3rd goal to feel comfortable. A good performance all round
Reposted by Peter Kok
7' GOAL!!! Marta Boiro plays the ball through to Leigha Bradding-Butler. Leigha lifts the bouncing ball over the Richmond keeper into the net. A wonderful finish
Clapton CFC 1 Richmond and Kew 0
Clapton CFC 1 Richmond and Kew 0
November 23, 2025 at 2:11 PM
7' GOAL!!! Marta Boiro plays the ball through to Leigha Bradding-Butler. Leigha lifts the bouncing ball over the Richmond keeper into the net. A wonderful finish
Clapton CFC 1 Richmond and Kew 0
Clapton CFC 1 Richmond and Kew 0
Reposted by Peter Kok
⚽ Next Women's First Team match ⚽
Back to league action with CCFC third in the table 🔥
📍 Old Spotted Dog Ground, E7 9NP
🚇 Forest Gate, Wanstead Park + 5 other stations nearby
🎟️ £5 | pay what you can concessions | free U13s
🍻 Bar, Caribbean food
www.claptoncfc.co.uk/2025/11/18/m...
Back to league action with CCFC third in the table 🔥
📍 Old Spotted Dog Ground, E7 9NP
🚇 Forest Gate, Wanstead Park + 5 other stations nearby
🎟️ £5 | pay what you can concessions | free U13s
🍻 Bar, Caribbean food
www.claptoncfc.co.uk/2025/11/18/m...
November 19, 2025 at 7:00 PM
⚽ Next Women's First Team match ⚽
Back to league action with CCFC third in the table 🔥
📍 Old Spotted Dog Ground, E7 9NP
🚇 Forest Gate, Wanstead Park + 5 other stations nearby
🎟️ £5 | pay what you can concessions | free U13s
🍻 Bar, Caribbean food
www.claptoncfc.co.uk/2025/11/18/m...
Back to league action with CCFC third in the table 🔥
📍 Old Spotted Dog Ground, E7 9NP
🚇 Forest Gate, Wanstead Park + 5 other stations nearby
🎟️ £5 | pay what you can concessions | free U13s
🍻 Bar, Caribbean food
www.claptoncfc.co.uk/2025/11/18/m...
Reposted by Peter Kok
Farage can now be easily boxed in to a corner where his only ‘defence’ becomes: “Yes I spouted Kremlin propaganda & Putin worship but, unlike Nathan Gill, I didn’t need bribes to do it.”
It is, once again, a question of whether interviewers have the temerity to shut down his whining obfuscations.
It is, once again, a question of whether interviewers have the temerity to shut down his whining obfuscations.
November 22, 2025 at 11:04 AM
Farage can now be easily boxed in to a corner where his only ‘defence’ becomes: “Yes I spouted Kremlin propaganda & Putin worship but, unlike Nathan Gill, I didn’t need bribes to do it.”
It is, once again, a question of whether interviewers have the temerity to shut down his whining obfuscations.
It is, once again, a question of whether interviewers have the temerity to shut down his whining obfuscations.
Reposted by Peter Kok
Very cool new work from the Iglesias group at MGH: A probabilistic histological atlas of the human brain for MRI segmentation (also available at OpenNeuro - openneuro.org/datasets/ds0...) : www.nature.com/articles/s41...
A probabilistic histological atlas of the human brain for MRI segmentation - Nature
NextBrain is an open source, probabilistic atlas of the entire human brain, assembled using artificial-intelligence-enabled registration and segmentation methods to reconstruct the multimodal serial h...
www.nature.com
November 21, 2025 at 3:32 PM
Very cool new work from the Iglesias group at MGH: A probabilistic histological atlas of the human brain for MRI segmentation (also available at OpenNeuro - openneuro.org/datasets/ds0...) : www.nature.com/articles/s41...
Reposted by Peter Kok
Having Johnson & Cummings in Downing Street when Covid struck was, just like Brexit, an entirely avoidable disaster caused largely by utterly appalling journalism. And now exactly the same clowns, arses & bigots with bylines are rolling out the red carpet for Farage.
www.thetimes.com/article/1b15...
www.thetimes.com/article/1b15...
Covid inquiry live: ‘Inexcusable’ delays under Johnson led to 23,000 deaths
Lockdowns may have been avoided if Boris Johnson’s government had acted faster, damning report finds
www.thetimes.com
November 20, 2025 at 5:14 PM
Having Johnson & Cummings in Downing Street when Covid struck was, just like Brexit, an entirely avoidable disaster caused largely by utterly appalling journalism. And now exactly the same clowns, arses & bigots with bylines are rolling out the red carpet for Farage.
www.thetimes.com/article/1b15...
www.thetimes.com/article/1b15...
Reposted by Peter Kok
Pls report: We're hiring! Looking for a postdoctoral research fellow to join our study of individual differences in plasticity in #blindness (+ possible extension to #deafness) using fMRI.
Details and application: apply.interfolio.com/177838
#hiring #postdoc #neurojobs #Neuroscience #NeuroTwitter
Details and application: apply.interfolio.com/177838
#hiring #postdoc #neurojobs #Neuroscience #NeuroTwitter
Apply - Interfolio
{{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
apply.interfolio.com
November 20, 2025 at 3:50 PM
Pls report: We're hiring! Looking for a postdoctoral research fellow to join our study of individual differences in plasticity in #blindness (+ possible extension to #deafness) using fMRI.
Details and application: apply.interfolio.com/177838
#hiring #postdoc #neurojobs #Neuroscience #NeuroTwitter
Details and application: apply.interfolio.com/177838
#hiring #postdoc #neurojobs #Neuroscience #NeuroTwitter
Reposted by Peter Kok
How do changes in context influence how we organize our memories in time?
Faster contextual changes are associated with faster drift in hippocampal activity and reduced temporal clustering in recalled memories.
Elegant work led by @lindsayrait.bsky.social!
www.jneurosci.org/content/45/4...
Faster contextual changes are associated with faster drift in hippocampal activity and reduced temporal clustering in recalled memories.
Elegant work led by @lindsayrait.bsky.social!
www.jneurosci.org/content/45/4...
Hippocampal Drift Rate Reflects the Temporal Organization of Memories
When freely recalling past events, individuals tend to successively remember stimuli that were studied close together in time—a phenomenon known as temporal clustering. Temporal clustering is thought ...
www.jneurosci.org
November 20, 2025 at 2:37 PM
How do changes in context influence how we organize our memories in time?
Faster contextual changes are associated with faster drift in hippocampal activity and reduced temporal clustering in recalled memories.
Elegant work led by @lindsayrait.bsky.social!
www.jneurosci.org/content/45/4...
Faster contextual changes are associated with faster drift in hippocampal activity and reduced temporal clustering in recalled memories.
Elegant work led by @lindsayrait.bsky.social!
www.jneurosci.org/content/45/4...