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. 2021 Nov 25;11:22964. doi: 10.1038/s41598-021-02203-4

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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NMFA of the adult Drosophila visual system. (a) The composition of the Drosophila visual system. (b) The connections between different regions in the Drosophila visual system. The area of the circle characterizes the size of the corresponding brain regions (i.e., number of neurons) and the width of the line between two circles characterizes the connection between the brain regions (i.e., number of neural connections shared by two regions). (c–h) The comparisons of the multifractal behavior between the networks in the optic lobe (OL) and the ventrolateral neuropils (VLNP). (c,d,g) The comparisons of the multifractal spectra (c), the mass exponent (d), generalized fractal dimension (d), and specific heat distribution (g) of the networks in the OL. (e,f,h) The comparisons of the multifractal spectra (e), the mass exponent (f), generalized fractal dimension (f), and specific heat distribution (h) of the networks in the VLNP. (i,j) The structure distance between the regional networks when q < 0 (i) and q > 0 (j) respectively. (k–m) The comparisons of the multifractal behaviors between the OL, VLNP, and the whole hemibrain. (k) The multifractal spectrum. (l) The generalized fractal dimension and mass exponent distribution. (m) The specific heat distribution.