It's been a long road, but glad to get this out. Many thanks to all the collaborators @katduecker.bsky.social Camille Fakche, @lauradugue.bsky.social @ajquinn.bsky.social @olejensen.bsky.social involved!! [6/6]

These findings challenge the assumption that rhythmic light stimulation is spectrally precise.

Instead, they suggest rhythmic stimulation elicits multiple, concurrent responses, each with its own neural and behavioural signature. [5/6]

Importantly, when analysing visual perceptual performance, models that accounted for both responses did a better job of explaining behaviour, suggesting fundamental and harmonic responses to stimulation independently shape visual perception. [4/6]

Using empirical mode decomposition, we found that:

(i) beta-band rhythmic light stimulation produces harmonic oscillatory responses at gamma frequencies, and...

(ii) theta-band rhythmic light stimulation produces harmonic oscillatory responses at alpha frequencies. [3/6]

Synchronisation theory states that a rhythmic input can entrain higher frequency endogenous rhythms, but does this happen when the brain responds to rhythmic stimulation?

We investigated this across three M/EEG datasets, using a variety of stimulation parameters and two experimental tasks. [2/6]