The effect of vertebral rotation forces on the development of pathological spinal curvatures

Andrzej Mroczkowski, Ewaryst Jaskólski

Andrzej Mroczkowski, Ewaryst Jaskólski – The effect of vertebral rotation forces on the development of pathological spinal curvatures. Fizjoterapia Polska 2007; 7(1); 80-86

Abstract

The main aim of this article is to provide physiotherapists, physicians, corrective exercise instructors and all persons responsible for the prevention and treatment of scoliosis with factual arguments justifying the need to pay more attention to examining the position of the pelvis in children. Early detection of abnormalities in pelvic position is particularly important. An oblique position of the pelvis in the frontal plane may signal the onset of scoliosis of mechanical origin. A persisting pathological oblique position of the pelvis results in changes in the distribution of the force of gravity on individual spinal structures. Starting from the lumbar segment, those changes may give rise to vertebral rotation forces. We investigated S-shaped scolioses to demonstrate a correlation between the location of the costal and lumbar prominences and the direction of the vertebral rotation force. The development of a vertebral rotation force may cause further augmentation of pathological curvatures of the spine. We believe that exercises of pelvic musculature should be employed as a measure to prevent scoliosis, particularly in the lumbar segment. Exercise is indicated for low-grade functional scolioses to facilitate reestablishment of appropriate static equilibrium in pelvic position and, through the pelvis, in the position of the spine. Children who spend much of their time in sitting or standing positions, which leads to insufficient movement, particularly in the pelvis, are the most vulnerable to abnormalities in pelvic position. Insufficient movement within the pelvis can weaken the muscles keeping the pelvis in position. Contemporary programmes of corrective exercise in schools should include exercises to improve the position of the pelvis. Examples of such exercises should be developed since not all methods can be employed in the corrective exercise setting, while at the same time pelvic exercises should be used in a considerable population of children.

Key words:
scoliosis, vertebral rotation, pelvis
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The influence of the pelvis position on body posture changes

Andrzej Mroczkowski

Andrzej Mroczkowski – The influence of the pelvis position on body posture changes. Fizjoterapia Polska 2009; 9(3); 258-265

Abstract
In scoliosis, a slanting pelvis position in the frontal plane may give rise to a mechanical link leading to inappropriate distribution of the gravity force on individual spinal components and, ultimately, to the development of a force rotating the vertebrae. The author analysed gravity-induced variations in load on the hip joint as a result of a slanting pelvis position. The resulting formulas indicate an uneven load on the hip joints associated with this pelvis position. Uneven bone load in the hip joints may lead to a difference in length increments between the lower limbs. A persistent pelvic slant causes changes in the distribution of the gravity force acting on individual spinal components. Pelvic slant is often the cause of lumbar scoliosis. The scoliosis, initially functional, may become structural due to the asymmetrical load on bones. It seems obvious that the main goal of corrective and compensatory management of pelvic slant should consist in exercises to strengthen the muscles responsible for pelvis position.
Słowa kluczowe
pelvis, scoliosis, body posture
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