Larger is twistier: Spectral analysis of gyrification (SPANGY) applied to adult brain size polymorphism

► Laplace-Beltrami operator based SPectral ANalysis of GYrification (Spangy) ► Display and quantification of the spatial frequency structure of gyrification ► Curvature power spectrum composed of 7 bands of increasing spatial frequency ► Folding spectral segmentation consistent with primary, secondary and tertiary folds ► Positive allometric scaling of the spectral contribution of higher frequency bands