Evaluation of segmental postural characteristics during quiet standing in control and Idiopathic Scoliosis patients

Zabjek, Karl; Leroux, Michel; Coillard, Christine; Rivard, Charles‐Hilaire; François, Patrice

doi:10.1016/j.clinbiomech.2005.01.003

Cited by 58 publications

(55 citation statements)

References 25 publications

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“…The anteroposterior component of GRF is a relevant clinical parameter to compare SG to CG and more specifically to specify the dynamics of lower limbs in stepping initiation. This point does not confirm previous results dealing with dynamics of posture [31] or of gait [17]. These authors indicate major issues in mediolateral component of GRF than the other components (anteroposterior and vertical forces).…”

Section: Discussioncontrasting

confidence: 97%

Dynamical asymmetries in idiopathic scoliosis during forward and lateral initiation step

et al. 2009

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Adolescent idiopathic scoliosis (AIS) is characterized by morphological trunk modifications acting on body mass distribution. Some specific biomechanical strategies during postural regulation have been reported. Given that spinal deformity is three-dimensional, some strategy analysis resulting from different stepping directions should lead to a better understanding of the dynamic adaptation of behaviour. The aim of this study is to identify dynamic strategies of AIS patients stepping in lateral and forward directions. Ten AIS patients with a right thoracic curve and 15 controlled volunteers have been tested. Ground reaction forces (GRF) have been recorded for rightlimb stepping and for left-limb stepping associated to forward and lateral directions. Force amplitudes, corresponding occurrences, impulses of stepping phases and an asymmetry index have been computed. Asymmetry and variability increased in the AIS group, compared to the control group, whatever the stepping direction is. Asymmetry for AIS patients systematically provides an increased left initiation GRF compared to a right initiation. Nevertheless, for both groups, lateral initiation shows the largest asymmetry index reported for a forward initiation. More precisely, adaptive dynamic strategies for the AIS group have been characterized by an asymmetry between right and left limbs for lateral and forward initiation. These results can be explained by the influence of scoliosis pathology on dynamic movements due to spinal deformity. A right thoracic curve leads to an extra weight on the limb, which needs to be moved; consequently, stepping initiation with the right limb was more challenging for patients than stepping with the left limb. For the AIS group, the observed variability can also depend on the ontogenesis of adaptive strategies. Lateral step initiation has to be considered as the most relevant paradigm to study scoliosis and may also serve as a clinical basis for treatment to analyse the dynamic postural control and asymmetry strategies of the scoliosis patient.

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Section: Discussioncontrasting

confidence: 97%

Dynamical asymmetries in idiopathic scoliosis during forward and lateral initiation step

et al. 2009

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“…This compares well to video-based systems where 10 mm in diameter surface markers are used to assess pelvis and trunk motions in standing [9] and for gait analysis [7] and where their accuracy has been analyzed and justified [24]. Table 2 Mean and standard deviations (SD) of the angle between the PSIS, ASIS, TSIC and WTIC for the transverse and frontal planes and the angle sustained by the line joining the midpoint of the right and left ASIS, TSIC and WTIC and S1 in the sagittal plane for the ablebodied and subjects with a moderate and severe scoliosis groups The 3D orientation of the pelvis is often based on the relative position of the ASIS and PSIS landmarks with respect to the centroid of the pelvis [9] or in reference to a specific plane [8] as in this study. Nault et al [3] and Zabjek et al [8] observed small pelvic rotations and frontal tilts in able-bodied and AIS girls but found no significant difference between these groups.…”

Section: Discussionmentioning

confidence: 99%

“…Their three-dimensional (3D) coordinates are obtained by means of video-based systems [7,8], or electromagnetic pointers such as the Flock of Birds [3]. Bony landmarks on the iliac crests and the spinous process of the first sacral vertebra (S1) served to identify pelvic spatial orientation [7,9] or its relation to other body segments like the head or shoulders [8].…”

Section: Introductionmentioning

confidence: 99%

Iliac crest orientation and geometry in able-bodied and non-treated adolescent idiopathic scoliosis girls with moderate and severe spinal deformity

Stylianides

Beaulieu

Dalleau³

et al. 2011

Eur Spine J

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Purpose To identify pelvic rotation and/or distortion in able-bodied and untreated AIS girls with moderate and severe scoliosis and verify association of pelvic morphological changes with Cobb angle increase. Methods The 3D coordinates of nine anatomic bony landmarks were identified to estimate pelvic orientation using a Flock of Birds system. The distances between the first sacral vertebral body (S1) and each of the eight iliac spine landmarks in all three planes were calculated to identify pelvic distortion. Analysis of variance was used to assess pelvic orientation and determine pelvic distortion. Pearson coefficients of correlation were used to identify any relationships between Cobb angle and pelvic morphological parameters.Results Pelvic orientation was similar in able-bodied and scoliotic girls regardless of the severity of the spinal deformity. Significant differences were observed in pelvic morphology between AIS with severe untreated scoliosis and those with a moderate scoliosis for the right anterosuperior iliac spines (ASIS), the tip of the superior iliac crest (TSIC) and the widest tip of the iliac crest (WTIC) widths from S1. Statistically significant correlations were observed between the Cobb angles and the iliac crest distances measured from S1. Conclusions Differences in iliac spine geometries occurred in the transverse plane correlating to Cobb angles which suggest altered bone growth in AIS girls. Such findings could indicate right thoracic spinal deformity as a result of pelvic torsion.

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“…8 Therefore, the flexicurve can constitute of a useful tool, especially in monitoring the children and young people's postural treatment, which requires frequent assessments because they are in the development stage 7 and they should not be exposed repeatedly to the deleterious effects of Xray examinations. 6,7 Considering the contour assessment of the vertebral column, the flexicurve can provide angular and linear measurements representing the curvatures. As for the measurement of the angle, the flexicurve has already been validated in relation to the gold standard for both the thoracic and lumbar.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5] Nevertheless, these exams are contraindicated in some population, as for people with cancer, pregnant women 6 and children in the development phase, 7 in addition to being a high cost procedure for underdeveloped and developing countries. 8 Thus, techniques for assessing noninvasive spine have been proposed as they are considered to be of low complexity and low cost.…”

Section: Introductionmentioning

confidence: 99%

Kyphosis index obtained in X-ray and with flexicurve assessment in children and young people

Ribeiro

Marchetti

Oliveira

et al. 2017

Rev. Bras. Saude Mater. Infant.

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Evaluation of segmental postural characteristics during quiet standing in control and Idiopathic Scoliosis patients

Cited by 58 publications

References 25 publications

Dynamical asymmetries in idiopathic scoliosis during forward and lateral initiation step

Dynamical asymmetries in idiopathic scoliosis during forward and lateral initiation step

Iliac crest orientation and geometry in able-bodied and non-treated adolescent idiopathic scoliosis girls with moderate and severe spinal deformity

Kyphosis index obtained in X-ray and with flexicurve assessment in children and young people

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