Tag: miednica

The influence of length, angle, height and depth of lumbar lordosis on selected features of the spine and pelvis

Mirosław Mrozkowiak


Mirosław Mrozkowiak – The influence of length, angle, height and depth of lumbar lordosis on selected features of the spine and pelvis. Fizjoterapia Polska 2022; 22(2); 32-41

Abstract
The objective of the research was to show the significant influence of the angle, depth, height and length of lumbar lordosis on selected features of the spine and pelvis.
Material and methods: The research was carried out in a_group of 2,361 children aged 7 to 15, in 6 consecutive six-month editions. It made it possible to register 16,608 observations of 31 features describing body posture using the photogrammetric method.
Results: For multiple regression analysis with the selection of a_subset of the optimal set of variables, the following influencing features were selected: angle, depth, height and length of lumbar lordosis.
Conclusions.
1. The features of lumbar lordosis do not influence the angle of torsion and inclination of the pelvis, and the influence on the features of the thoracic spine is varied.
2. The features of lumbar lordosis influence the height, depth and angle of thoracic kyphosis.
3. The length of lumbar lordosis does not influence the length of thoracic kyphosis, and the angle of lumbar lordosis does not influence the length of lumbar lordosis.
Key words:
lumbar lordosis, spine, pelvis
Pobierz/Download/下載/Cкачиваете 免費下載（僅限英文版）

Biomechanical aspects of modern models of pelvis stability. Part II: symphysis pubis and anterior oblique muscle sling

Rafał Gnat, Edward Saulicz, Mirosław Kokosz, Michał Kuszewski

Rafał Gnat, Edward Saulicz, Mirosław Kokosz, Michał Kuszewski – Biomechanical aspects of modern models of pelvis stability. Part II: symphysis pubis and anterior oblique muscle sling. Fizjoterapia Polska 2006; 6(4); 328-333

Abstract
Biomechanical model of pelvis stability based on self-bracing mechanism contributed to certain discrimination of previous proposals mentioning the pelvic ring and ascribing important stabilizing role to pubic symphysis. However, the paper presents some arguments challenging thesis about complete lack of significance of the symphysis and anterior part of the pelvic stabilising system in process of maintaining stability. Both the symphysis itself as well as anterior oblique muscle sling seem to find their own, meaningful place there. Maybe this role could not be considered primary, but surely it is supplementary one. Observations of biomechanical, clinical and evolutional nature seem to support such a point of view. Spreading of the effective range of self-bracing due to compressive forces acting on the sacroiliac joint and increased friction between its surfaces divides the burden of maintaining stability on bigger number of muscles. The adductor longus that belongs to anterior oblique muscle sling seems to locate its attach-ment in the proper area. Moreover, a view of the pelvis, where the force closure mechanism is executed by posterior muscle slings exclusively brings about compelling impression of shearing forces arising within the sacroiliac joints. Activation of the anterior portion of the stabilizing system heads off the incoming threat immediately. Also assuming the upright body posture resulted in humans in more frequent, in comparison with other species, backward excursions of the centre of gravity. In such conditions the anterior part of the pelvic stabilizing system will always be activated in order to maintain stability.

Key words:
pelvis, symphysis pubis, anterior oblique muscle sling

Invalid download ID. Pobierz bezpłatnie artykuł w j. angielskim

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
Invalid download ID. Pobierz bezpłatnie artykuł w j. angielskim

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
Invalid download ID. Pobierz bezpłatnie artykuł w j. angielskim