how are the spectrum and autocorrelation of a signal related?

Published: December 22, 2020

the power spectrum & the autocorrelation function (ACF) of a signal are heavily related. so, spectral & ACF measures will capture similar aspects of the data. shown here: how changes in spectral exponent lead to changes in ACF full width at half-maximum amplitude. pic.twitter.com/mYqpYe5pOl
— Natalie Schaworonkow (@nschawor) December 22, 2020

topographical distribution of auditory sources in MEG vs. EEG

Published: March 14, 2024

in auditory paradigms using MEG, peak activation is over temporal sensors. with EEG, curiously often peak activation is on vertex channels. 🤔

it feels counterintuitive, given the distance from source, right? but it is expected, as this simulation with 2 active dipoles shows. pic.twitter.com/P91W2bEmg8
— Natalie Schaworonkow (@nschawor) March 18, 2024

paper: waveform shape in bats

Published: March 07, 2024

waveform shape of oscillations can reflect properties of underlying spiking dynamics. if neuronal units fire in synchrony, the local field potential can be more asymmetric (here: sharp troughs).
read about this & cool bat rhythms 🦇 in our new paper: https://t.co/rf5et9Wy9q pic.twitter.com/pTJM8kDDNW
— Natalie Schaworonkow (@nschawor) March 7, 2024

Natalie Schaworonkow

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topographical distribution of auditory sources in MEG vs. EEG

paper: waveform shape in bats