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brain rhythms lab

@haegenslab.bsky.social
525 followers 4 following 14 posts

we study oscillatory brain dynamics @columbiauniversity.bsky.social PI: saskia haegens

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brain rhythms lab @haegenslab.bsky.social · 18/09/2026
In this MEG study we used ICA to identify two functionally distinct alpha components that are differentially modulated by attention and show opposite relationships with behavioural performance — highlighting the importance of disentangling overlapping alpha dynamics that stem from different sources!
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brain rhythms lab @haegenslab.bsky.social · 06/11/2025
We argue that beta frequency shifts arise from changes in connectivity between weakly coupled oscillators and that, more than a spectral fingerprint, they reflect the activation of behaviorally relevant communication channels, allowing for the selective transmission of information.
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brain rhythms lab @haegenslab.bsky.social · 06/11/2025
New preprint out! In this opinion paper, we review our recent work showing that frontal beta frequency shifts signal categorical decisions. We propose that the observed frequency modulations emerge from the recruitment of distinct neural ensembles when different (categorical) decisions are made.
arxiv.org
Beta frequency shifts in decision making: Spectral fingerprints or communication channels?
Recent evidence suggests that beta-band activity plays a key role in decision-making. Here we review our recent work in humans and non-human primates showing that beta-band frequency shifts in frontal...
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brain rhythms lab @haegenslab.bsky.social · 27/10/2025
We replicate our prior macaque findings (www.nature.com/articles/s41...) and extend them to humans, showing that the beta rhythm is a reliable marker of perceptual decisions. Stay tuned for a review covering this line of work!
nature.com
Distinct beta frequencies reflect categorical decisions - Nature Communications
How the brain achieves context-dependent, flexible categorization remains poorly understood. By looking at neural ensemble formation, this study finds that distinct beta rhythms signal categorical dec...
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brain rhythms lab @haegenslab.bsky.social · 27/10/2025
In EEG & MEG experiments (n = 82), participants made perceptual decisions in three different tasks:  • Temporal categorization  • Delayed match-to-sample  • Cross-modal discrimination  Across all, a beta frequency shift in the prefrontal cortex predicted the chosen category.
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brain rhythms lab @haegenslab.bsky.social · 27/10/2025
Another paper out! New research from our lab explores how beta-band activity signals decisions. We show that subtle shifts in beta-band *frequency* signal categorical decision outcomes — a neural signature that generalizes across tasks and species. ➡️ www.cell.com/iscience/ful...
cell.com
Beta-band frequency shifts signal decisions in human prefrontal cortex
Beta-band synchronization has been found to be content-specific, particularly during decision-making. Recently, we showed a beta-band frequency shift in macaque prefrontal cortex to reflect categorica...
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Reposted by brain rhythms lab
PLOS Biology @plosbiology.org · 27/10/2025
Fluctuations in #AlphaOscillations influence whether we perceive faint stimuli, but how? @joeyzhou.bsky.social @haegenslab.bsky.social &co show that alpha associated with the #visual system modulate sensitivity, while #sensorimotor alpha affects decision criteria @plosbiology.org 🧪 plos.io/4ho3ecR
For each state (of states 1-4), the spatial distribution of power and coherence were estimated for frequencies between 1 and 45 Hz. In each panel, the power map (top left) shows group-averaged power, relative to the mean across states. The coherence network (bottom) shows the top 98% coherence with colored lines, and centers of each parcel with black dots. The PSD graph (top right) shows both the state-specific (colored solid line) and static PSD (i.e., the average across states, black line).
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brain rhythms lab @haegenslab.bsky.social · 23/10/2025
Here we showed that these two mechanisms co-exist in the human brain! While the visual alpha network modulates sensitivity, the sensorimotor alpha network modulates criterion in perceptual decision-making.
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brain rhythms lab @haegenslab.bsky.social · 23/10/2025
Check out our latest work led by @joeyzhou.bsky.social on alpha oscillatory networks in PLOS Biology! ➡️ journals.plos.org/plosbiology/... Do ongoing alpha activity fluctuations influence perceptual sensitivity or criterion?
journals.plos.org
Distinct alpha networks modulate different aspects of perceptual decision-making
Fluctuations in alpha-band neural oscillations influence whether we perceive faint stimuli, but how these oscillations relate to different perceptual processes is not clear. This study shows that alph...
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Reposted by brain rhythms lab
brain rhythms lab @haegenslab.bsky.social · 13/03/2025
we are recruiting! looking for a postdoc with great electrophys and data analysis skills for a project in collaboration with @jonescompneurolab.bsky.social and @dralexharris.bsky.social to study the role of beta frequency shifts in decision-making.
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brain rhythms lab @haegenslab.bsky.social · 16/03/2025
Read more in our new paper by @joeyzhou.bsky.social, now on bioRxiv! And here is our prior work trying to understand the same process: www.jneurosci.org/content/41/4...
jneurosci.org
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brain rhythms lab @haegenslab.bsky.social · 16/03/2025
Low alpha power boosts faint stimulus detection—but how? 🤔 After much head-scratching, we took a network approach and found that different alpha networks play distinct roles: the visual alpha network tunes perceptual sensitivity, while the sensorimotor alpha network shapes decision criteria. 🧠✨
biorxiv.org
Distinct Alpha Networks Modulate Different Aspects of Perceptual Decision-Making
Why do we sometimes perceive a faint stimulus but miss it at other times? One explanation is that conscious perception fluctuates with the brains internal state, influencing how external stimuli are p...
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brain rhythms lab @haegenslab.bsky.social · 13/03/2025
this project will involve electrophys experiments, spectral analysis of EEG and LFP data, and @hnnsolver.bsky.social to model beta dynamics. if you are into oscillations and looking for a postdoc position, please be in touch :) more info at: nyspi.applicantpro.com/jobs/3675337
nyspi.applicantpro.com
Postdoctoral Researcher - New York, NY
Job Title: Postdoctoral Researcher Grade: 17 Salary: $61,613-$67,000 The Research Foundation for Mental Hygiene is seeking a qualified applicant to fill a full-time Postdoctoral Researcher position fo...
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brain rhythms lab @haegenslab.bsky.social · 13/03/2025
we are recruiting! looking for a postdoc with great electrophys and data analysis skills for a project in collaboration with @jonescompneurolab.bsky.social and @dralexharris.bsky.social to study the role of beta frequency shifts in decision-making.
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brain rhythms lab @haegenslab.bsky.social · 30/11/2024
In both species, we find that post-interval ERPs are significantly different between stimuli that were classified as “long” or “short” (while objective duration was the same). Together, our results show that common neural mechanisms support time categorization in primates. ⏱️🧠
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brain rhythms lab @haegenslab.bsky.social · 30/11/2024
New paper out! peerj.com/articles/184... We asked whether neural mechanisms for time estimation are similar in monkeys and humans. We compared ERPs during a temporal bisection task, in which participants had to determine whether the duration of a time interval was longer or shorter than a prototype.
peerj.com
Common neural mechanisms supporting time judgements in humans and monkeys
There has been an increasing interest in identifying the biological underpinnings of human time perception, for which purpose research in non-human primates (NHP) is common. Although previous work, ba...
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