An example of randomly initialized complete wave trajectory (a) and emergent loop pattern (b) for the cortical fold model with inhomogeneity extracted from HRA volume registered to MNI152 space and with fixed anisotropy tensor σ(2) (ε = 0.1). The trajectory was initialized with wave vector k=(−0.90,0.24,0.36) inside the inhomogeneous layer with voxel coordinates r=(66,86,126). High resolution movie links: S11-H1/S11-H1, S11-H2/S11-H2, S11-H3/S11-H3. Low resolution movie links: S11-L1/S11-L1, S11-L2/S11-L2, S11-L3/S11-L3.