System relationships of the thoracic vertebrae anatomy and surrounding muscles in overweight men

Objective - to identify patterns of structure and relationship of elements of the thoracic spine and surrounding muscles in males of the 2nd period of adulthood with overweight and obesity of the 1st degree. Materials and methods. The study was performed on computed tomograms of the thoracic spine of 63 healthy men aged 36 to 60 years with a height of 170 to 186 cm and a body weight of up to 74.3 to 110 kg. The vertebral dimensions and the width of the paravertebral muscle mass were evaluated ((Me; IQ-IIIQ), factor analysis by the principal component method). Results. With an increase in the ordinal number of the vertebra, the increase in the width and anterior-posterior size of the bodies occurs unevenly, two points of decrease in the median value of the size of the vertebral bodies are determined - ThV and ThX. A narrowing of the spinal canal ThI to ThVII was revealed, followed by an increase in size to ThXII. A decrease in the median values of the anterior and posterior heights of bodies ThIII and IX was found. The median values of the height of the legs increase with an increase in the ordinal number of the vertebra, however, a decrease in the median values was found in ThIV, ThVI, ThVIII 1 and ThX. A decrease in size was found between the vertices of the transverse processes of the vertebrae and the vertices of the transverse and spinous processes. The decrease in their median value is most pronounced in the upper thoracic vertebrae from ThI to ThVII. Analysis of the width of the muscle arrays revealed a wave-like decrease in the median width, with three rises at the level of ThIII, ThVI and ThXI and declines at the level of ThV, ThIX and ThXII. The results of factor analysis revealed two segments in the thoracic spine. The maximum influence on the structure of the first segment of ThI-VII is exerted by the width of the paravertebral muscle array. In the second segment from ThVIII to ThXII, the width and angle of inclination of the spinous process have the maximum effect. Conclusion. The thoracic spine in men includes two segments that differ in function: the cranial segment, which depends on the activity of the paravertebral muscles, and the caudal segment, which reflects the supporting function.

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