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.

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!

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.

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.

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...

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

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. ⏱️🧠