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EEG: influence of muscle noise on 1/f-exponents

June 19, 2024

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

Tags: 1/f-exponent, artifacts, emg, spectral-analysis

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MEG artifacts: railway traction power

April 10, 2026

more MEG artefacts: the tram runs in ~200 meter distance from the MEG lab here. even though the MEG sensors are shielded by a few tons of metal, they still pick up the railway traction power signal (at 16.67 Hz in Germany), a demo of their high sensitivity.

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— Natalie Schaworonkow (@nschawor.bsky.social) 10 April 2026 at 15:05

time-frequency representation of ECoG data

March 13, 2026

time-frequency representation of human electrocorticography data. 🌊 one axis shows frequency, the other time. the high peaks correspond to a prominent alpha rhythm at 10 Hz which appears and subsides during the experiment.

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— Natalie Schaworonkow (@nschawor.bsky.social) 13 March 2026 at 17:12

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© 2026 Natalie Schaworonkow. Adapted from Jekyll & AcademicPages, a fork of Minimal Mistakes.