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back from the CuttingEEGX conference & adding the shiny sticker to my laptop sticker collection. ✨
had to opportunity to talk with fun people about fun topics (measurement & analysis of oscillations, 〰️-theory building) in the CuttingEEGX ‘Evolving Oscillations’ session as the session chair. 
& if you want to learn some EEG/MEG analysis, you can already put the planned PracticalMEEG event in October 2025 in your calendar. 🙂
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just came back from #SPR2024, soaking up sun + good vibes in Prague 🌟
we had a really nice symposium “A Century of the Berger Rhythm: Then and Now” (only too short, we need to do a longer rhythms workshop somewhere 🙂)
Other symposium speakers were supernice, all the talks in our symposium:
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coolest conference souvenir: electronic neuron circuit lu.i
— Natalie Schaworonkow (@nschawor) October 3, 2024
on this board: an implementation of a leaky integrate and fire neuron, with the membrane voltage visualized with LEDs (or connect an oscilloscope to see the traces). pic.twitter.com/KOlb20uBJq
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influence of muscle noise on spectrum & 1/f-exponent estimation, example from EEG. generally: the more muscle noise, the flatter the spectrum at higher frequencies. pic.twitter.com/swk03G50BT
— Natalie Schaworonkow (@nschawor) June 19, 2024
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sometimes for electrophysiological signals, mean spectral power in specific frequency bands is computed, often with a kind of normalization.
— Natalie Schaworonkow (@nschawor) June 9, 2024
➡️ demo how to get different ratios of low & high freq power without any oscillatory contribution (by changing 1/f-exp. & spectral knee). pic.twitter.com/o16FKJLesD
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"beta-activity as bursts", I am def 💯 OK with that.
— Natalie Schaworonkow (@nschawor) June 6, 2024
but imho the pendulum has swung too far in the direction that all beta activity equals close to 1-2 cycle bursts. so just to illustrate diversity, here is some more sustained beta-activity, resting-state EEG.
〰️🙂〰️ pic.twitter.com/s9SnbdQy6j
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MEG/EEG: "we use source reconstruction" – all problems solved?
— Natalie Schaworonkow (@nschawor) May 16, 2024
plotted here: crosstalk – possible contribution from other locations to reconstructed activity @ red dot. no strong activity at these locations: 👍 otherwise: 🫠
➡️crosstalk can be from distant locations pic.twitter.com/FetHqq5LoZ
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human & macaque monkey brain, 3d printed. 🧠〰️ pic.twitter.com/q27d0BomQG
— Natalie Schaworonkow (@nschawor) April 27, 2024
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in auditory paradigms using MEG, peak activation is over temporal sensors. with EEG, curiously often peak activation is on vertex channels. 🤔
— Natalie Schaworonkow (@nschawor) March 18, 2024
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
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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).
— Natalie Schaworonkow (@nschawor) March 7, 2024
read about this & cool bat rhythms 🦇 in our new paper: https://t.co/rf5et9Wy9q pic.twitter.com/pTJM8kDDNW
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Fourier Transform: transform time-domain signals into the spectral domain, easy. but why use only these two domains?
— Natalie Schaworonkow (@nschawor) February 23, 2024
➡️ fractional Fourier Transform, for transform into the space in between. time domain – alpha=0; spectral domain – alpha=1, other alphas: a strange world. 🙃 pic.twitter.com/3hvJu4oS2k
imagine the regular Fourier transform as a 90° rotation in time-frequency plane, so fractional Fourier transform let's you rotate all around.
— Natalie Schaworonkow (@nschawor) February 23, 2024
could be used to reduce frequency-varying noise.
you see that I have trouble to label axes, as time morphs to ??? morphs to frequency. 🤔 pic.twitter.com/hjq0nTBZSb
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intracranial activity from the awake but resting human brain in the delta-frequency band (1–4 Hz), a couple of bursting cycles, not a sustained rhythm. pic.twitter.com/36NNQm9mKc
— Natalie Schaworonkow (@nschawor) February 15, 2024
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simulated a bursting neuron, using an analog circuit. 🙂 (had to buy more cables for this one). pic.twitter.com/lxfO9QcsLe
— Natalie Schaworonkow (@nschawor) January 31, 2024
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updated for 2024: list of summer schools & short courses in the realm of (computational) neuroscience or data analysis of EEG / MEG / LFP and the like: 🔗 google sheet.
