Article

Brain folding as a Fourier series yields a developmental clock

2026-07-09

Abstract excerpt

The human fetal cortex begins as a smooth spheroid and progressively folds into a stereotypical sulcal and gyral pattern that defines the final brain geometry. Two centuries ago, Joseph Fourier showed that any function on a bounded domain can be built from oscillations at successive frequencies, and that truncating the series at some maximum frequency yields a smoothed version of the original. Here I show the natu...

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Literature Corpus work: 29138191-56d2-5cd5-904f-3c2b53005cdb
DOI: 10.64898/2026.07.07.737104

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