brain rhythms lab
haegenslab.bsky.social
brain rhythms lab
@haegenslab.bsky.social
490 followers 1 following 11 posts
we study oscillatory brain dynamics @columbiauniversity.bsky.social PI: saskia haegens
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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.
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...
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...
www.cell.com
Reposted by brain rhythms lab
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
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.
Reposted by brain rhythms lab
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.
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...
www.jneurosci.org
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. 🧠✨
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...
www.biorxiv.org
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.
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. ⏱️🧠
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.
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...
peerj.com