Changes of the morphometric indices and fractal dimension of the spinal cord neurons during ontogenesis of the cherry salmon Oncorhynchus masou

Isaeva, V. V.; Puschina, E. V.; Karetin, Yu. A.

doi:10.1134/s1063074006020052

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…The iterated self-similar morphogenesis of branching epithelial channels in the jellyfish Aurelia aurita gastro-vascular system, the gill tracheal system in the larvae of mayflies Siphlonurus immanis and Parameletus chelifer, and neurons of the central nervous system of the fishes Pholidapus dybowskii, Oncorhynchus keta, and O. masou have been studied [17,18,21,22,123,[131][132][133] (see also Section 6.1). For the quantitative characteristics of the morphology of the groups of spinal cord neurons in the cherry salmon O. masou during early ontogenesis, the fractal dimension and some more traditional morphometric indices were determined from the first to the second year of fish life [133]. The correlation between the fractal dimension and the main morphometric values of the dendritic trees was found in the neurons investigated.…”

Section: Scale Symmetrymentioning

confidence: 99%

“…This is only a simplified, superficial view of the branching of vertebrate neurons. A branching system of neuron processes is used for neural signal collection, transmission, processing, and integration [119,133]); however, many aspects of branching morphogenesis in neurons remain poorly understood. The epithelial surface is an interface between the internal medium of an organism and the outside environmental medium (or between two internal compartments), and fractal morphogenesis during metazoan evolution and development increases this interface providing a better adaptation of the organism to the environment as well as a compact packaging of a structure within a small volume, thus providing a certain functional advantage for the organism [18,21,22,119].…”

Section: Scale Symmetrymentioning

confidence: 99%

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Symmetry Transformations in Metazoan Evolution and Development

Isaeva

Kasyanov

2021

Symmetry

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In this review, we consider transformations of axial symmetry in metazoan evolution and development, the genetic basis, and phenotypic expressions of different axial body plans. In addition to the main symmetry types in metazoan body plans, such as rotation (radial symmetry), reflection (mirror and glide reflection symmetry), and translation (metamerism), many biological objects show scale (fractal) symmetry as well as some symmetry-type combinations. Some genetic mechanisms of axial pattern establishment, creating a coordinate system of a metazoan body plan, bilaterian segmentation, and left–right symmetry/asymmetry, are analysed. Data on the crucial contribution of coupled functions of the Wnt, BMP, Notch, and Hedgehog signaling pathways (all pathways are designated according to the abbreviated or full names of genes or their protein products; for details, see below) and the axial Hox-code in the formation and maintenance of metazoan body plans are necessary for an understanding of the evolutionary diversification and phenotypic expression of various types of axial symmetry. The lost body plans of some extinct Ediacaran and early Cambrian metazoans are also considered in comparison with axial body plans and posterior growth in living animals.

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Section: Scale Symmetrymentioning

confidence: 99%

Section: Scale Symmetrymentioning

confidence: 99%

Symmetry Transformations in Metazoan Evolution and Development

Isaeva

Kasyanov

2021

Symmetry

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“…In caudal part of brain some reticulospinal cells, cells of nucleus raphi, nuclei of V, VII, IX and X pairs of cranial nerves, much earlier acquire the features of phenotypic specialization than in the structures of forebrain. Measurements of fractal dimension and some morphometric parameters (total length of branches, number of terminal branches, number of branching points, and cell area) were used for the quantification of morphological patterns of two spinal neuron groups in young Oncorhynchus masou at two ontogenetic stages [26]. During the 1st and 2nd years of life, the neurons of brainstem and spinal cord have enough developed dendrites and axons, which, however, have growth cones, indicating the continued postembryonic period of growth and development of these structures and their further differentiation.…”

Section: Participation Of Classic Neurotransmitters In the Postembryomentioning

confidence: 99%

Participation of Neurochemical Signaling in Adult Neurogenesis and Differentiation

Пущина¹,

Вараксин²,

Обухов³

2014

Neurochemistry

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“…Based on Mandelbrot ( 1982 ) and his concept of fractal geometry, another more secret “revolution in morphometrics” may pick up speed despite the criticism “that a fractal cow is often not much better than a spherical cow ” (Buldyrev, 2012 ). Quite a few studies across (paleo‐) biological disciplines have demonstrated the potential of fractals for morphometrics (Aiello et al, 2007 ; Bruno et al, 2008 ; Isaeva et al, 2006 ; Klinkenbuß et al, 2020 ; Lutz & Boyajian, 1995 ). Kaczor et al ( 2012 ) suggested fractal dimensions as an indicator of roughness in protein structures.…”

Section: Introductionmentioning

confidence: 99%

Can fractal dimensions objectivize gastropod shell morphometrics? A case study from Lake Lugu (SW China)

Wiese

Harrington

Hartmann

et al. 2022

Ecology and Evolution

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Morphometrics are fundamental for the analysis of size and shape in fossils, particularly because soft parts or DNA are rarely preserved and hard parts such as shells are commonly the only source of information. Geometric morphometrics, that is, landmark analysis, is well established for the description of shape but it exhibits a couple of shortcomings resulting from subjective choices during landmarking (number and position of landmarks) and from difficulties in resolving shape at the level of micro‐sculpture. With the aid of high‐resolution 3D scanning technology and analyses of fractal dimensions, we test whether such shortcomings of linear and landmark morphometrics can be overcome. As a model group, we selected a clade of modern viviparid gastropods from Lake Lugu, with shells that show a high degree of sculptural variation. Linear and landmark analyses were applied to the same shells in order to establish the fractal dimensions. The genetic diversity of the gastropod clade was assessed. The genetic results suggest that the gastropod clade represents a single species. The results of all morphometric methods applied are in line with the genetic results, which is that no specific morphotype could be delimited. Apart from this overall agreement, landmark and fractal dimension analyses do not correspond to each other but represent data sets with different information. Generally, the fractal dimension values quantify the roughness of the shell surface, the resolution of the 3D scans determining the level. In our approach, we captured the micro‐sculpture but not the first‐order sculptural elements, which explains that fractal dimension and landmark data are not in phase. We can show that analyzing fractal dimensions of gastropod shells opens a window to more detailed information that can be considered in evolutionary and ecological contexts. We propose that using low‐resolution 3D scans may successfully substitute landmark analyses because it overcomes the subjective landmarking. Analyses of 3D scans with higher resolution than used in this study will provide surface roughness information at the mineralogical level. We suggest that fractal dimension analyses of a combination of differently resolved 3D models will significantly improve the quality of shell morphometrics.

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Changes of the morphometric indices and fractal dimension of the spinal cord neurons during ontogenesis of the cherry salmon Oncorhynchus masou

Cited by 9 publications

References 23 publications

Symmetry Transformations in Metazoan Evolution and Development

Symmetry Transformations in Metazoan Evolution and Development

Participation of Neurochemical Signaling in Adult Neurogenesis and Differentiation

Can fractal dimensions objectivize gastropod shell morphometrics? A case study from Lake Lugu (SW China)

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