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frequency ratios of brain rhythms

January 23, 2026

if you look into the activity of any brain, usually many different rhythms can be seen. is there any systematic relationship between their frequencies? there are proposals (often by physicists 🙃) that rhythms are organized according to specific ratio, e.g. the golden ratio or simply factor 2.

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— Natalie Schaworonkow (@nschawor.bsky.social) 23 January 2026 at 12:22

Tags: peak-frequency, 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.