## 4 Discussion  
The presented research indicates the validity of the concept of the formation and development of idiopathic scoliosis as a consequence of the asymmetry of erector spinae muscle tone. Since the beginning of research on erector spinae EMG examination, it has been noticed that there is a relationship between the size of the spinal curvature angle and the uneven tension of the erector spinae muscles on \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{6}{c}{**Linear Stepwise Regression Model for SEMG Amplitude of the Erector Spinae and Scoliosis**} \\ \hline \hline
**Variable** & **b\({}^{*}\)** & **Std. Error Z b\({}^{*}\)** & **b** & **Std. Error Z b** & **t (95)** & **\(p\)** \\ \hline Constant & & & 1.09 & 0.68 & 1.59 & 0.11 \\ Lower limbs up, lumbar section, left side & 0.36 & 0.13 & 0.01 & 0.00 & 2.77 & 0.01 \\ Lower limbs up, lumbar section, right side & \(-\)0.29 & 0.15 & \(-\)0.01 & 0.01 & \(-\)2.00 & 0.05 \\ Standing position, chest segment, left side & 0.56 & 0.21 & 0.04 & 0.01 & 2.71 & 0.01 \\ Standing position, chest segment, right side & \(-\)0.42 & 0.19 & \(-\)0.03 & 0.01 & \(-\)2.18 & 0.03 \\ \hline \hline \multicolumn{6}{c}{**R = 0.43 R\({}^{2}\) = 0.18; Correction R\({}^{2}\) = 0.12; F (7.91) = 2.94; \(p\) = 0.01**} \\ \hline \hline \multicolumn{6}{c}{**Linear Stepwise Regression Model for SEMG Amplitude of the Erector Spinae and Curvature Angle in the**} \\ \multicolumn{6}{c}{**Scoliosis Group**} \\ \hline \hline
**Variable** & **b\({}^{*}\)** & **Std. Error Z b\({}^{*}\)** & **b** & **Std. Error Z b** & **t (95)** & **\(p\)** \\ \hline Constant & & & 10.14 & 0.90 & 11.27 & 0.001 \\ Supine position, lumbar section, left side & 0.25 & 0.09 & 0.03 & 0.01 & 2.69 & 0.01 \\ \hline \hline \multicolumn{6}{c}{R = 0.24; R\({}^{2}\) = 0.06 Correction R\({}^{2}\) = 0.04; F (3.137) = 2.9; \(p\) = 0.04} \\ \hline \hline \end{tabular} \({}^{1}\) b\({}^{*}\)—constant regression, Std. Error Z b\({}^{*}\)—standard error of the regression constant; b—the partial regression coefficients, Std. Error Z b—standard error of the partial regression coefficient, \(t\)—statistical test, \(p\)—level of significance.  
\end{table} 
Table 5: Linear stepwise regression model for SEMG amplitude of the erector spinae in children with scoliosis \({}^{1}\). both sides of the spine. Therefore, the goal of scoliosis therapy should be to restore the proper tension of these muscles. Disturbances in the balance of muscle tension can trigger a set of changes that create a clinical and anatomopathological image of scoliosis. In this study, it was observed that the largest generalized SEMG amplitude of the erector spinae muscles is present in scoliosis. The larger, asymmetrical activity of the erector spinae visible in the SEMG amplitude record is associated with an increase in the angle of the spinal curvature. The increase of SEMG amplitude on the side of curvature protrusion--both during rest and movement--was observed by many researchers [18]. However, the interpretation of this phenomenon occurs in most of the cases studied. [PERSON] [19] believed that idiopathic scoliosis arises as a result of the asymmetrical operation of the erector spinae muscle, the bioelectric activity of which, greater on the convex side, is the cause of deformation. In the treatment of thoracic scoliosis, the author carried out de-innervation of the erector spinae muscle by resection of the posterior spinal nerve from Th7 to Th10 on the side of curvature. [PERSON] [20; 21; 22] claimed that the cause of idiopathic scoliosis is the imbalance of muscles rotating the spine on the side of the protruding curvature. [PERSON] [23], [PERSON] et al. [24] and [PERSON] [25] interpret the phenomenon of excessive bioelectrical muscle activity of the convex side as exaggerated reflex to stretching, as a compensation mechanism, or fatigue reaction.