visual hallucinations can appear in the form of specific geometrical patterns. these patterns have been related to activity waves in the visual cortex via coordinate transformation models; planar cortical waves become spirals in the visual field due to retinotopic organization. pic.twitter.com/hQuuJKumPo
— Natalie Schaworonkow (@nschawor) April 20, 2021
ok, imagine you have an oscillation that is not symmetric around 0 (small direct current shift) with some amplitude modulation, for instance with 1/f-dynamics. ➡️ then these 1/f-dynamics will show up in low frequency part of spectrum (red); in addition to around oscillation peak (yellow).
— Natalie Schaworonkow (@nschawor.bsky.social) October 16, 2025 at 3:58 PM
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3D printed brain, some LEDs inside, hand for scale.
