The lumbar intervertebral discs in males and females: measures, correlation, modeling

Keywords: modeling, intervertebral disc, anthropometry, MRI.


Annotation. The use of math algorithms for calculating the anatomical and functional parameters of the organs and systems based on somatometric parameters and allows to individualize and quantify the indicators of the norm. In order to build mathematical models to calculate the size of the lumbar spine intervertebral discs somatometry of almost healthy 80 girls and women aged 16-26 years and 74 juniors and men aged 17-28 years was performed. As well as magnetic resonance imaging of the lumbar spine was used to obtain the MR-images in the axial, sagittal and frontal planes in the T2-TSE mode and to perform MR-morphometry by using the DICOM image processing program. The correlation analysis and estimation of interrelations of somatometric parameters with partial linear sizes of intervertebral disks, the sum of the disks’ sizes and relative somato-disk rate are carried out. Body weight was found to have strong correlations with relative somato-disc rate (mean correlation coefficients for L1-L5 intervertebral discs were 0.803 and 0.821 in women and men, respectively) and weak and very weak correlations with partial disc sizes. When constructing the regression model, as an intermediate stage of the calculation, the somato-disk rate (the ratio of mass-growth coefficient to the sum of the sizes of the intervertebral disc) was used. The simulation of the three sizes’ sum of intervertebral discs L1-L5 segments was ultimately based on weight and body length (coefficient of determination R2 is from 80.4% for the sum of the intervertebral discs L1-L2 in girls and women and boys and men, up to 89.7% for the sum of the size of the intervertebral disc L4-L5 in girls and women). Verification of the obtained mathematical models showed a discrepancy between the calculated and measured indicators of the sums of intervertebral disc sizes in the presence of disc degeneration. The used mathematical algorithm for calculating individualized indicators of linear dimensions of lumbar intervertebral discs on the base of somatometric parameters allowed to determine the absence of objective quantitative changes in unchanged intervertebral discs and avoid overdiagnosis.


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How to Cite
Danylevych, V. P. (2022). The lumbar intervertebral discs in males and females: measures, correlation, modeling. Reports of Vinnytsia National Medical University, 26(1), 17-26.