Marcus Siems
@marcussiems.bsky.social
🧠👨🔬 Postdoc UKE Hamburg - attention, decision-making & large-scale dynamics
Twitter: @itSiemsThatWay
Twitter: @itSiemsThatWay
Pinned
Inter-areal coupling for cognition through coincident oscillatory transients
How do large-scale brain networks interact to enable cognition? Correlated oscillations, a mechanism for inter-areal interactions, can be expressed as phase coherence or amplitude co-fluctuations. Whi...
www.biorxiv.org
New Preprint alert 🚨
“Inter-areal coupling for cognition through coincident oscillatory transients” together with
@ycaoneuro.bsky.social
@ktsetsos.bsky.social
@donnerlab.bsky.social &
Andreas Engel
#MEG #neuroscience #bioRxiv
www.biorxiv.org/content/10.1...
“Inter-areal coupling for cognition through coincident oscillatory transients” together with
@ycaoneuro.bsky.social
@ktsetsos.bsky.social
@donnerlab.bsky.social &
Andreas Engel
#MEG #neuroscience #bioRxiv
www.biorxiv.org/content/10.1...
Reposted by Marcus Siems
Fascinating that #EEG is one of the top trends, while #fMRI is declining.
We've just set up a @ucl.ac.uk EEG community and attendance was way over what we expected. Interesting times.
#neuroskyence
We've just set up a @ucl.ac.uk EEG community and attendance was way over what we expected. Interesting times.
#neuroskyence
Navigate the rise and fall of research topics over five decades using The Transmitter's interactive map, which is based on a semantic analysis of nearly 350,000 abstracts in leading neuroscience journals. Explore more: www.thetransmitter.org/publishing/p...
#neuroskyence #StateOfNeuroscience
#neuroskyence #StateOfNeuroscience
Putting 50 years of neuroscience on the map
Navigate the rise and fall of research topics over five decades using our interactive map, which is based on a semantic analysis of nearly 350,000 abstracts.
www.thetransmitter.org
November 29, 2025 at 7:45 PM
Fascinating that #EEG is one of the top trends, while #fMRI is declining.
We've just set up a @ucl.ac.uk EEG community and attendance was way over what we expected. Interesting times.
#neuroskyence
We've just set up a @ucl.ac.uk EEG community and attendance was way over what we expected. Interesting times.
#neuroskyence
Reposted by Marcus Siems
December 9th at 12PM: Lucina Uddin will be discussing brain networks during the Philosophy and Neuroscience Salon hosted by @pessoabrain.bsky.social
Sign up here: umd.zoom.us/meeting/regi...
Sign up here: umd.zoom.us/meeting/regi...
November 30, 2025 at 12:48 AM
December 9th at 12PM: Lucina Uddin will be discussing brain networks during the Philosophy and Neuroscience Salon hosted by @pessoabrain.bsky.social
Sign up here: umd.zoom.us/meeting/regi...
Sign up here: umd.zoom.us/meeting/regi...
Reposted by Marcus Siems
High-Frequency Activity Encodes the Temporal Dynamics of Hierarchical Prediction Errors in Humans: An Electrocorticography Study https://www.biorxiv.org/content/10.1101/2025.11.29.691270v1
November 30, 2025 at 8:15 AM
High-Frequency Activity Encodes the Temporal Dynamics of Hierarchical Prediction Errors in Humans: An Electrocorticography Study https://www.biorxiv.org/content/10.1101/2025.11.29.691270v1
Reposted by Marcus Siems
The basal forebrain plays the cortex like a piano.
A cholinergic mechanism orchestrating task-dependent computation across the cortex
In an ever-changing environment, animals often need to switch between performing different tasks involving distinct sets of cognitive processes. Many such tasks involve neural activity distributed acr...
www.biorxiv.org
November 28, 2025 at 5:51 PM
The basal forebrain plays the cortex like a piano.
Reposted by Marcus Siems
Nature Sci Rep publishes incoherent AI slop. eLife publishes a paper which the reviewers didn't agree with, making all the comments and responses public with thoughtful commentary. One of these journals got delisted by Web of Science for quality concerns from not doing peer review. Guess which one?
November 27, 2025 at 1:35 PM
Nature Sci Rep publishes incoherent AI slop. eLife publishes a paper which the reviewers didn't agree with, making all the comments and responses public with thoughtful commentary. One of these journals got delisted by Web of Science for quality concerns from not doing peer review. Guess which one?
Reposted by Marcus Siems
🚨Friends, we’re happy to share that our book is available for pre-order! 🎉
We aimed to cover all the foundations of the topic in an accessible manner for a large audience.
It could help set up a bachelor-level curriculum on the topic.
Pre-orders are very key for the fate of books: shorturl.at/Dxbif
We aimed to cover all the foundations of the topic in an accessible manner for a large audience.
It could help set up a bachelor-level curriculum on the topic.
Pre-orders are very key for the fate of books: shorturl.at/Dxbif
November 26, 2025 at 11:38 AM
🚨Friends, we’re happy to share that our book is available for pre-order! 🎉
We aimed to cover all the foundations of the topic in an accessible manner for a large audience.
It could help set up a bachelor-level curriculum on the topic.
Pre-orders are very key for the fate of books: shorturl.at/Dxbif
We aimed to cover all the foundations of the topic in an accessible manner for a large audience.
It could help set up a bachelor-level curriculum on the topic.
Pre-orders are very key for the fate of books: shorturl.at/Dxbif
Reposted by Marcus Siems
New work from the lab published in @cp-neuron.bsky.social by @jonasterlau.bsky.social and Jan Martini. We describe that trial-by-trial variability indexes recurrent connectivity across the cortical hierarchy, which supports reliable and flexible coding www.cell.com/neuron/abstr... (1/4)
Structure in noise: Recurrent connectivity shapes neural variability to balance perceptual and cognitive demands in the human brain
Does neural variability reflect random noise or a feature that benefits adaptive behavior?
Using intracranial recordings in humans, Terlau et al. demonstrate that neural variability
results from the r...
www.cell.com
November 10, 2025 at 5:06 PM
New work from the lab published in @cp-neuron.bsky.social by @jonasterlau.bsky.social and Jan Martini. We describe that trial-by-trial variability indexes recurrent connectivity across the cortical hierarchy, which supports reliable and flexible coding www.cell.com/neuron/abstr... (1/4)
Reposted by Marcus Siems
Evidence from 14 research funding programmes confirms that early winners tend to keep winning (Matthew effect). But the idea that an early setback makes you stronger later doesn’t replicate widely.
buff.ly/UEtcRd4
buff.ly/UEtcRd4
November 25, 2025 at 11:02 AM
Evidence from 14 research funding programmes confirms that early winners tend to keep winning (Matthew effect). But the idea that an early setback makes you stronger later doesn’t replicate widely.
buff.ly/UEtcRd4
buff.ly/UEtcRd4
Reposted by Marcus Siems
November 24, 2025 at 6:39 PM
Reposted by Marcus Siems
Preparing overt eye movements and directing covert attention are neurally coupled. Yet, this coupling breaks down at the single-cell level. What about populations of neurons?
We show: EEG decoding dissociates preparatory overt from covert attention at the population level:
doi.org/10.1101/2025...
We show: EEG decoding dissociates preparatory overt from covert attention at the population level:
doi.org/10.1101/2025...
May 13, 2025 at 7:51 AM
Preparing overt eye movements and directing covert attention are neurally coupled. Yet, this coupling breaks down at the single-cell level. What about populations of neurons?
We show: EEG decoding dissociates preparatory overt from covert attention at the population level:
doi.org/10.1101/2025...
We show: EEG decoding dissociates preparatory overt from covert attention at the population level:
doi.org/10.1101/2025...
Reposted by Marcus Siems
⏳ Just 3 weeks left!
Submit your work or volunteer as a reviewer for #OHBM2026 in Bordeaux, France.
⏰ Deadline: December 15, 2025, at 11:59 pm EST, USA
Don’t wait! Be part of shaping the scientific program!
#BrainMapping #Neuroimaging
Submit your work or volunteer as a reviewer for #OHBM2026 in Bordeaux, France.
⏰ Deadline: December 15, 2025, at 11:59 pm EST, USA
Don’t wait! Be part of shaping the scientific program!
#BrainMapping #Neuroimaging
November 24, 2025 at 12:01 PM
⏳ Just 3 weeks left!
Submit your work or volunteer as a reviewer for #OHBM2026 in Bordeaux, France.
⏰ Deadline: December 15, 2025, at 11:59 pm EST, USA
Don’t wait! Be part of shaping the scientific program!
#BrainMapping #Neuroimaging
Submit your work or volunteer as a reviewer for #OHBM2026 in Bordeaux, France.
⏰ Deadline: December 15, 2025, at 11:59 pm EST, USA
Don’t wait! Be part of shaping the scientific program!
#BrainMapping #Neuroimaging
Reposted by Marcus Siems
Reposted by Marcus Siems
📈🧠 We're looking for brains! 🧠📈
Postdoc + PhD positions are available to help pioneer fetal MEG with optically pumped magnetometers, measuring prenatal responses to sound and light to understand how we start making sense of the world even before we're born. 🐣
Please get in touch to hear more!
Postdoc + PhD positions are available to help pioneer fetal MEG with optically pumped magnetometers, measuring prenatal responses to sound and light to understand how we start making sense of the world even before we're born. 🐣
Please get in touch to hear more!
October 8, 2025 at 2:27 PM
📈🧠 We're looking for brains! 🧠📈
Postdoc + PhD positions are available to help pioneer fetal MEG with optically pumped magnetometers, measuring prenatal responses to sound and light to understand how we start making sense of the world even before we're born. 🐣
Please get in touch to hear more!
Postdoc + PhD positions are available to help pioneer fetal MEG with optically pumped magnetometers, measuring prenatal responses to sound and light to understand how we start making sense of the world even before we're born. 🐣
Please get in touch to hear more!
New Preprint alert 🚨
“Inter-areal coupling for cognition through coincident oscillatory transients” together with
@ycaoneuro.bsky.social
@ktsetsos.bsky.social
@donnerlab.bsky.social &
Andreas Engel
#MEG #neuroscience #bioRxiv
www.biorxiv.org/content/10.1...
“Inter-areal coupling for cognition through coincident oscillatory transients” together with
@ycaoneuro.bsky.social
@ktsetsos.bsky.social
@donnerlab.bsky.social &
Andreas Engel
#MEG #neuroscience #bioRxiv
www.biorxiv.org/content/10.1...
Inter-areal coupling for cognition through coincident oscillatory transients
How do large-scale brain networks interact to enable cognition? Correlated oscillations, a mechanism for inter-areal interactions, can be expressed as phase coherence or amplitude co-fluctuations. Whi...
www.biorxiv.org
November 24, 2025 at 7:21 AM
New Preprint alert 🚨
“Inter-areal coupling for cognition through coincident oscillatory transients” together with
@ycaoneuro.bsky.social
@ktsetsos.bsky.social
@donnerlab.bsky.social &
Andreas Engel
#MEG #neuroscience #bioRxiv
www.biorxiv.org/content/10.1...
“Inter-areal coupling for cognition through coincident oscillatory transients” together with
@ycaoneuro.bsky.social
@ktsetsos.bsky.social
@donnerlab.bsky.social &
Andreas Engel
#MEG #neuroscience #bioRxiv
www.biorxiv.org/content/10.1...
Reposted by Marcus Siems
Dysfunctional oscillatory bursting patterns linked to working memory in adolescents with attention deficit hyperactivity disorder
link.springer.com/article/10.3...
#neuroscience
link.springer.com/article/10.3...
#neuroscience
Dysfunctional oscillatory bursting patterns linked to working memory in adolescents with attention deficit hyperactivity disorder - Cognitive, Affective, & Behavioral Neuroscience
Background Identifying neural markers of clinical symptom fluctuations is prerequisite to developing more precise brain-targeted treatments in psychiatry. We have recently shown that working memory (W...
link.springer.com
November 22, 2025 at 7:44 PM
Dysfunctional oscillatory bursting patterns linked to working memory in adolescents with attention deficit hyperactivity disorder
link.springer.com/article/10.3...
#neuroscience
link.springer.com/article/10.3...
#neuroscience
Reposted by Marcus Siems
Reposted by Marcus Siems
🚨New preprint on @biorxivpreprint.bsky.social:
“Competing Neural Decision Variables in Human Frontal Cortex Shape Decision Confidence”
by Alessandro Toso, @ayeletarazi.bsky.social, @jrochav.bsky.social, @ktsetsos.bsky.social & Tobias H. Donner
🔗 www.biorxiv.org/content/10.1...
“Competing Neural Decision Variables in Human Frontal Cortex Shape Decision Confidence”
by Alessandro Toso, @ayeletarazi.bsky.social, @jrochav.bsky.social, @ktsetsos.bsky.social & Tobias H. Donner
🔗 www.biorxiv.org/content/10.1...
Competing Neural Decision Variables in Human Frontal Cortex Shape Decision Confidence
Mounting evidence indicates that decisions emerge from a competition between populations of neurons encoding the different choice options. Theoretical models propose that the outcome of this competiti...
www.biorxiv.org
November 3, 2025 at 9:12 PM
🚨New preprint on @biorxivpreprint.bsky.social:
“Competing Neural Decision Variables in Human Frontal Cortex Shape Decision Confidence”
by Alessandro Toso, @ayeletarazi.bsky.social, @jrochav.bsky.social, @ktsetsos.bsky.social & Tobias H. Donner
🔗 www.biorxiv.org/content/10.1...
“Competing Neural Decision Variables in Human Frontal Cortex Shape Decision Confidence”
by Alessandro Toso, @ayeletarazi.bsky.social, @jrochav.bsky.social, @ktsetsos.bsky.social & Tobias H. Donner
🔗 www.biorxiv.org/content/10.1...
Reposted by Marcus Siems
New paper: Working memory readout varies with frontal theta rhythms. A theta traveling wave swept across the frontal cortex like radar, modulating performance of a working memory task. Because cognition is rhythmic.
www.cell.com/neuron/abstr...
#neuroscience @picowerinstitute.bsky.social
www.cell.com/neuron/abstr...
#neuroscience @picowerinstitute.bsky.social
Working memory readout varies with frontal theta rhythms
Han et al. show that frontal theta oscillations rhythmically control access to working
memory. The theta rhythm sweeps across the mental image, shaping behavior by coordinating
spikes and beta oscilla...
www.cell.com
October 20, 2025 at 3:06 PM
New paper: Working memory readout varies with frontal theta rhythms. A theta traveling wave swept across the frontal cortex like radar, modulating performance of a working memory task. Because cognition is rhythmic.
www.cell.com/neuron/abstr...
#neuroscience @picowerinstitute.bsky.social
www.cell.com/neuron/abstr...
#neuroscience @picowerinstitute.bsky.social
Reposted by Marcus Siems
Selective coupling and decoupling coordinate distributed brain networks for precise action https://www.biorxiv.org/content/10.1101/2025.10.19.683309v1
October 20, 2025 at 6:15 PM
Selective coupling and decoupling coordinate distributed brain networks for precise action https://www.biorxiv.org/content/10.1101/2025.10.19.683309v1
Reposted by Marcus Siems
Decisions: Tracking the evolution of a single choice
elifesciences.org/articles/103...
elifesciences.org/articles/103...
October 25, 2024 at 4:26 PM
Decisions: Tracking the evolution of a single choice
elifesciences.org/articles/103...
elifesciences.org/articles/103...
Reposted by Marcus Siems
Deeply honoured to receive an #ERCCoG ERC Consolidator Grant to explore the Dynamics of Attribute Weighting in Multiattribute Choice. Grateful to my amazing ERC StG team: @ycaoneuro.bsky.social, @marcussiems.bsky.social , Maryam Tohidi, Molly Stapleton for their support and trust. 🙏@ERC_Research
December 3, 2024 at 12:09 PM
Deeply honoured to receive an #ERCCoG ERC Consolidator Grant to explore the Dynamics of Attribute Weighting in Multiattribute Choice. Grateful to my amazing ERC StG team: @ycaoneuro.bsky.social, @marcussiems.bsky.social , Maryam Tohidi, Molly Stapleton for their support and trust. 🙏@ERC_Research
Reposted by Marcus Siems
Very happy to see our work “Geometry of visuospatial working memory information in miniature gaze patterns” published now. Was a fun ride, w/ @lindedomingo.bsky.social #neuroscience #neurosykence #PsychSkySci
New paper with @bernhardspitzer.bsky.social, investigating WM through small eye movements. We found that, even during attempted fixation, gaze patterns not only reflect memory content but also capture its dynamic evolution over time. Available on Nature Human Behaviour www.nature.com/articles/s41...
December 18, 2023 at 6:56 PM
Very happy to see our work “Geometry of visuospatial working memory information in miniature gaze patterns” published now. Was a fun ride, w/ @lindedomingo.bsky.social #neuroscience #neurosykence #PsychSkySci
Reposted by Marcus Siems
We’re excited about our first paper looking at speech encoding in single neurons across the depth of human cortex. Out today in @nature! www.nature.com/articles/s41... [1/6]
Large-scale single-neuron speech sound encoding across the depth of human cortex - Nature
High-density single-neuron recordings show diverse tuning for acoustic and phonetic features across layers in human auditory speech cortex.
www.nature.com
December 13, 2023 at 4:48 PM
We’re excited about our first paper looking at speech encoding in single neurons across the depth of human cortex. Out today in @nature! www.nature.com/articles/s41... [1/6]
Reposted by Marcus Siems
There is a reason why the brain's activity is so rhythmic
Rhythmic sampling of multiple decision alternatives in the human brain
www.biorxiv.org/content/10.1...
#neuroscience
Rhythmic sampling of multiple decision alternatives in the human brain
www.biorxiv.org/content/10.1...
#neuroscience
December 9, 2023 at 1:31 PM
There is a reason why the brain's activity is so rhythmic
Rhythmic sampling of multiple decision alternatives in the human brain
www.biorxiv.org/content/10.1...
#neuroscience
Rhythmic sampling of multiple decision alternatives in the human brain
www.biorxiv.org/content/10.1...
#neuroscience