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Asymetrie obręczy barkowej i biodrowej u dziewcząt z bocznym skrzywieniem kręgosłupa i postawą skoliotyczną

Jacek Wilczyński

Studia Medyczne 2013; 29 (2): 152–159
Data publikacji online: 2013/08/05
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Introduction

When examining the posture of a child’s body, one tries to determine if one is dealing with an idiopathic scoliosis and what the risk of its progression is. The positions of the shoulder girdle and the shoulder blades as well as the pelvic girdle and the iliac spine should also be evaluated. Asymmetric changes in these structures usually precede the emergence of scoliosis and are connected with a scoliotic posture. A scoliotic posture is a tendency to tilt the axis of the spine from its straight alignment, connected rather with an improper manner of bearing the body. Each spontaneously developing scoliosis is at the very beginning a small-angle curvature (a scoliotic posture) and only with time do its real developmental tendencies come to light. Double-arched curvatures, however, cannot be called a scoliotic posture, even when both angles are less than 10°, because the manifestation of a second arc is already a sign of compensation of an actual scoliosis [1]. It is impossible to determine whether the changes in the position of both girdles are the cause of the scoliosis but it is known that such an arrangement limits the possibilities for correction, and thus perpetuates the defect. Lowering and protrusion of the anterior superior iliac spine is not a result of passive changes in the shape of the pelvis, but an active compensative activity of the muscles of the third group, responsible for the connection between the spine and the pelvis. Such asymmetry can be observed in major scoliosis, but also in children with slight symptoms. That is why there is a low probability of this being a sign of spontaneous compensation of the curvature.

Aim of the research

Therefore, one should aim to re-establish and restore the stabilising function of the pelvic girdle and the sacroiliac joint and the shoulder girdle [2–5]. The aim of the research was to evaluate the asymmetry of the shoulder and pelvic girdles in girls aged 7–18 with scoliosis and a scoliotic posture.

Material and methods

Twenty-eight girls aged 7–18 with scoliosis and a scoliotic posture were included in the research. Selection of the examined people was deliberate. The children were registered in the Międzyszkolny Ośrodek Gimnastyki Korekcyjnej i Kompensacyjnej (Interschool Corrective and Compensatory Gymnastics Centre) in Starachowice. The research was carried out in June 2011. 3D digital photogrammetry using the moiré effect was adopted in the examination of body posture (Figures 1–4) [6]. An evaluation was made of the asymmetry of the shoulder and pelvic girdles in girls aged 7–18 (Table 1).

Statistical analysis



Depending on the conformity of the variables’ distributions with the normal distribution, and the values of skewness and kurtosis, parametric or nonparametric tests were adopted. The variables were verified in terms of normal distribution with the Shapiro-Wilk test. Analysis of variance with data screening was used to determine the relationship between the parameters of posture and age of the examined. The connection between the frequency and type of defects in the frontal plane and age was determined using the χ2 test. Value of p ≤ 0.05 was assumed as the level of significance [7].

Results

The examined were divided into the following three age groups: 7–11 years old, 12–14 years old and 15–18 years old. There were 8 (28.57%) girls in the 7–11 group, 13 (46.43%) in the 12–14 group and 7 (25.00%) in the 15–18 range (Table 2). Body height, body mass and body mass index (BMI) of the examined were also ascertained (Tables 3, 4, Figure 5). Analysis of variance with data screening showed significant relationships between BMI and the age of the examined (p ≤ 0.05) (Table 5). Based on the size of the angle of the curvature of the spine the following were singled out scoliotic posture (1–9°) and an idiopathic scoliosis (≥ 10°). There were 21 (75%) children with a scoliotic posture and 7 (25%) with idiopathic scoliosis. The frequency and type of defects in the frontal plane do not depend on the age of the examined (Table 6, Figure 6).

In the examined group, asymmetry of the right shoulder (ABP) amounted to 2.61 mm, and of the left (ABL) to 6.07 mm (Table 7). In the range of 7–11, asymmetry of the right shoulder amounted to 1.0 mm, and of the left to 4.75 mm; in the 12–14 range, asymmetry of the right shoulder amounted to 2.92 mm, and of the left to 8.15 mm; and in the 15–18 group, asymmetry of the right shoulder amounted to 3.86 mm, and of the left to 3.71 mm (Tables 8–10). The angle of the shoulder line (KLB) was 1.39° for the whole group (Table 7). In the 7–11 range, this angle was 5.88°; in the 12–14 range it was slightly smaller – 5.31°; and in the 15–18 group it was the largest – 6.0° (Tables 8–10). For the whole group, asymmetry of the right scapula (ALP) amounted to 2.86 mm, and asymmetry of the left scapula (ALL) to 2.25 mm (Table 7). In the 7–11 range, asymmetry of the right scapula amounted to

3.25 mm, and asymmetry of the left scapula to 0.5 mm; in the 12–14 range, asymmetry of the right scapula amounted to 1.92 mm, and asymmetry of the left scapula to 3.23 mm; and in the 15–18 group, asymmetry of the right scapula amounted to 4.14 mm, and asymmetry of the left scapula to 2.43 mm. Asymmetry of the shoulders and shoulder blades was found in all of the examined. It was more often the left shoulder along with the left shoulder blade that were raised (Tables 8–10). The value of the pelvic-tilt angle (KNM) was 1.68° for the whole group (Table 7). In the 7–11 range, this angle was 1.13°; in the 12–14 range, it was slightly larger – 1.77°; and in the 15–18 group, it was the largest 2.14° (Tables 8–10).

The value of the pelvic-torsion angle (KSM) was 3.39° for the whole group (Table 7). In the 7–11 range, this angle was the largest and amounted to 4.25°; in the 12–14 range, it was slightly smaller – 3.15°; and in the 15–18 group, it was the smallest – 2.86°. Posterior rotation of the left hip bone occurred more often (counter-clockwise pelvic rotation) (Tables 8–10). The va­lue of the shoulders-pelvis asymmetry coefficient (WBM) was 99.64% for the whole group (Table 7). In the 7–11 range, WBM amounted to 102.13%; in the 12–14 range, it amounted to 97.46%; and in the 15–18 group to 100.86% (Tables 7–9). The shoulders-KK asymmetry coefficient (WBK) was 101.68 % for the whole group (Table 7). In the 7–11 range, WBK amounted to 102.13%; in the 12–14 range it amounted to 101.77%; and in the 15–18 group it had the value of 101.00% (Tables 8–10). The asymmetry coefficient of shoulders in relation to C7 (WBC) was 105.00 % for the whole group (Table 7). In the 7–11 range, WBC amounted to 105.88%; in the 12–14 range, it amounted to 103.77%; and in the 15–18 group it had the value of 106.29% (Tables 8–10). Analysis of variance with data screening did not show any significant relationships between the parameters of posture and the age of the examined (Table 11).

Discussion

Asymmetries in the areas of the shoulders, scapulae and iliac spine are often the first symptom of scoliosis. They are closely related to the anatomical and functional conditions of the thoracic and lumbar vertebrae. One attempts to restore the distorted static balance of the body posture simultaneously in three planes (frontal, transverse and sagittal), taking into consideration the influence on the three following items: the pelvis and lumbar vertebrae, the thoracic vertebrae, and the thorax and shoulder girdle. The pelvis along with the sacral bone form the base of the spine. Each of its, even slightest, deviation in the frontal plane causes a disruption in the equilibrium in this plane and entails a lateral curvature of the spine [8]. Skolimowski et al. [9], in their research on pelvic functional parameters, stated that irrespectively of the type of scoliosis, the oblique pelvis type is dominant (about 50%), with the posterior and anterior superior iliac spines inclined in the same direction. An improper position of the pelvis has an impact on the angular position of the vertebrae above, that is the lumbar and thoracic vertebrae. The causes of such a state may be relaxation or contraction of the muscular apparatus, or anatomical disorders, e.g. a relative shortening of the lower limb. In lumbar scoliosis, the pelvis may be included in the lumbar curvature, meaning a three-dimensional displacement in the same direction as the lumbar vertebrae; or it can be part of the counter-curvature and be subjected to displacement in the opposite direction. In the end, distortion of the pelvis is a resultant of the three-dimensional displacement and the three-dimensional internal distortion of the pelvis. The pelvis is an osseous rim and its slight distortion is hard to detect. At times, clinically, an uneven positioning of the iliac spines can be observed, despite the lower limbs being of equal length; there can also be protrusion or retraction of one of the iliac spines in the transverse plane, asymmetry in the range of movement in the hip joints, and asymmetry in the rotational positioning of the lower legs and feet. The aforementioned remarks should not be understood in an aetiological way and are not an argument for any of the postulated causes of scoliosis occurrences. Orthopaedists will not unravel the aetiology of scoliosis, however, knowledge of the pathogenesis is key to an early diagnosis and an effective treatment [2]. Asymmetrical positioning of the iliac spines, meaning the positioning of the sacral bone in connection with a slight displacement of the long axes of the two branches of pubic bones in relation to each other, which gives the image of a twisted pelvis, can sometimes be observed on the cards from tests using the moiré effect or on X-ray pictures. These changes are most often a result of a backward rotation of the left hip bone connected with a forward rotation (nutation of the upper-left side) of the sacral bone around the right axis of a diagonal drawn from the upper-right corner of the sacrum to the lower-left corner. The lower-right corner of the sacrum rotates backwards. At the same time, a counter-positioning of the right part of the ilium and of the sacrum, connected with it by the sacro-iliac joint, can be observed. The consequence of this process is a disorder of the functioning of sacro-iliac joints, which are also a sensorimotor organ participating in the formation of the upright posture and play their part in the coordination of the movement of upper and lower limbs [10–14]. That is why in choosing the methods of treatment for scoliotic postures and scoliosis, asymmetries occurring in the areas of the shoulder and pelvic girdles, the pelvis and the sacrum should also be taken into consideration, apart from, among others, the angle of the curvature and its location.

Conclusions

Asymmetry of the shoulders and shoulder blades was found in all of the examined. The left shoulder along with the left shoulder blade were raised more often. The right side of the pelvis was lowered in most of the examined. Posterior rotation of the left hip bone occurred more often (counter-clockwise pelvic rotation). The values of WBM, WBK and WBC asymmetry coefficients confirm the asymmetry of the shoulder and hip girdles. Analysis of variance did not show any significant relations of asymmetry of the shoulder and hip girdles and the age of the examined.

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Address for correspondence:



Jacek Wilczyński PhD, Prof. UJK

Department of Neurology, Neurological Rehabilitation

and Kinesitherapy

Institute of Physiotherapy

Faculty of Health Sciences

Jan Kochanowski University

Al. IX wieków Kielc 19, 25-317 Kielce, Poland

Phone: +48 603 703 926

E-mail: jwilczyński@onet.pl
Copyright: © 2013 Jan Kochanowski University in Kielce This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
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