scholarly journals Intra- and Interday Reliability of Spine Rasterstereography

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Laura Guidetti ◽  
Valerio Bonavolontà ◽  
Alessandro Tito ◽  
Victor M. Reis ◽  
Maria Chiara Gallotta ◽  
...  
Keyword(s):  
Inflection Point ◽  
Pelvic Tilt ◽  
Intraclass Correlation ◽  
Kyphotic Angle ◽  
Lateral Deviation ◽  
Trunk Length ◽  
Pelvic Inclination ◽  
Surface Rotation ◽  
Trunk Imbalance ◽  
Pelvic Torsion

To determine intra- and interday reliability of spine rasterstereographic system Formetric 4D with and without reflective markers. Twenty-six healthy volunteers (M group) had two markers placed in correspondence of vertebra prominens and intergluteal cleft, and 24 volunteers (NM group) were assessed without markers. All participants were analyzed two times in the same day and one time on a separate day. Trunk length, kyphotic angle, lordotic angle, pelvic inclination, kyphotic and lordotic apex, right and left lateral deviation,flèche cervicaleandlombaire, trunk imbalance, pelvic tilt, inflection point, rotation correction, right and left surface rotation, pelvic torsion, and trunk torsion were measured. Intraclass correlation coefficient (ICC) and Cronbach Alpha (Cα) were calculated. In M group, for intra-, interday, and overall evaluations, the higher reliability coefficients were 0.971, 0.963, and 0.958 (ICC) and 0.987, 0.983, and 0.985 (Cα) for trunk length, kyphotic angle, and lordotic apex, respectively; while in NM group, they were 0.978, 0.982, and 0.972 and 0.989, 0.991, and 0.991 for trunk length. In M group, the lower values were 0.598, 0.515, and 0.534 (ICC) and 0.742, 0.682, and 0.784 (Cα) for trunk and pelvic torsion and in NM group 0.561, 0.537, and 0.461 and 0.731, 0.695, and 0.729 for left lateral deviation. The reliability of most parameters was excellent.

scholarly journals Dynamic spinal posture and pelvic position analysis using a rasterstereographic device

2020 ◽  
Author(s):  
Roman Michalik ◽  
Juliane Hamm ◽  
Valentin Quack ◽  
Jörg Eschweiler ◽  
Matthias Gatz ◽  
...  
Keyword(s):  
Pelvic Obliquity ◽  
Kyphotic Angle ◽  
Lateral Deviation ◽  
Dynamic Conditions ◽  
Spinal Posture ◽  
Surface Rotation ◽  
Trunk Inclination ◽  
Static Conditions ◽  
Pelvic Position ◽  
Trunk Imbalance

Abstract Background: Until recently, rasterstereographic analysis of the spine was limited to static measurements. However, understanding and evaluating the motion of the spine under dynamic conditions is an important factor in the diagnosis and treatment of spinal pathologies. Aim of this study was to study the spinal posture and pelvic position under dynamic conditions and compare it to static measurements using a dynamic rasterstereographic system. Methods: A total of 121 healthy volunteers (56 females; 65 males) were included in this observational study. The parameters trunk inclination, trunk imbalance, pelvic obliquity, kyphotic angle, lordotic angle, surface rotation and lateral deviation were studied and compared under static and dynamic (1,2,4,5 km/h) conditions using the system “Formetric 4D Motion ® “ (DIERS International GmbH, Germany). Results: Female volunteers had a higher lordotic angle than males under static conditions (p<0.001). Trunk inclination (5.31° vs. 6.74°), vertebral kyphotic angle (42.53° vs. 39,59°) and surface rotation (3.35° vs. 3.81°) increase under dynamic conditions (p<0.001). Trunk inclination and lordotic angle both show significant changes during walking compared to static conditions (p<0.001). Conclusion: The spinal posture differs between females and males during standing and during walking. Rasterstereography is a valuable tool for the dynamic evaluation of spinal posture and pelvic position, which can also be used to quantify motion in the spine and therefore it has the potential to improve the understanding and treatment of spinal pathologies. Trial registration: retrospectively registered

scholarly journals Dynamic spinal posture and pelvic position analysis using a rasterstereographic device

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Roman Michalik ◽  
Juliane Hamm ◽  
Valentin Quack ◽  
Jörg Eschweiler ◽  
Matthias Gatz ◽  
...  
Keyword(s):  
Pelvic Obliquity ◽  
Kyphotic Angle ◽  
Lateral Deviation ◽  
Dynamic Conditions ◽  
Spinal Posture ◽  
Surface Rotation ◽  
Trunk Inclination ◽  
Static Conditions ◽  
Pelvic Position ◽  
Trunk Imbalance

Abstract Background Until recently, rasterstereographic analysis of the spine was limited to static measurements. However, understanding and evaluating the motion of the spine under dynamic conditions is an important factor in the diagnosis and treatment of spinal pathologies. The aim of this study was to study the spinal posture and pelvic position under dynamic conditions and compare it to static measurements using a dynamic rasterstereographic system. Methods A total of 121 healthy volunteers (56 females; 65 males) were included in this observational study. The parameters trunk inclination, trunk imbalance, pelvic obliquity, kyphotic angle, lordotic angle, surface rotation, and lateral deviation were studied and compared under static and dynamic (1, 2, 4, 5 km/h) conditions using the system “Formetric 4D Motion®“ (DIERS International GmbH, Germany). Results Female volunteers had a higher lordotic angle than males under static conditions (p < 0.001). Trunk inclination (5.31° vs. 6.74°), vertebral kyphotic angle (42.53° vs. 39, 59°), and surface rotation (3.35° vs. 3.81°) increase under dynamic conditions (p < 0.001). Trunk inclination and lordotic angle both show significant changes during walking compared to static conditions (p < 0.001). Conclusion The spinal posture differs between females and males during standing and during walking. Rasterstereography is a valuable tool for the dynamic evaluation of spinal posture and pelvic position, which can also be used to quantify motion in the spine and therefore it has the potential to improve the understanding and treatment of spinal pathologies. Trial registration Retrospectively registered

scholarly journals Sacral incidence to pubis: a novel and alternative morphologic radiological parameter to pelvic incidence in assessing spinopelvic sagittal alignment

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Yasuhito Takahashi ◽  
Kei Watanabe ◽  
Masashi Okamoto ◽  
Shun Hatsushikano ◽  
Kazuhiro Hasegawa ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Pelvic Incidence ◽  
Sagittal Alignment ◽  
Intraclass Correlation ◽  
Hip Dislocation ◽  
Standing Position ◽  
Regression Equation ◽  
Whole Body ◽  
Spinopelvic Parameters ◽  
Pelvic Inclination

Abstract Background Although pelvic incidence (PI) is a key morphologic parameter in assessing spinopelvic sagittal alignment, accurate measurements of PI become difficult in patients with severe hip dislocation or femoral head deformities. This study aimed to investigate the reliability of our novel morphologic parameters and the correlations with established sagittal spinopelvic parameters. Methods One hundred healthy volunteers (25 male and 75 female), with an average age of 38.9 years, were analysed. Whole-body alignment in the standing position was measured using a slot-scanning X-ray imager. We measured the established spinopelvic sagittal parameters and a novel parameter: the sacral incidence to pubis (SIP). The correlation coefficient of each parameter, regression equation of PI using SIP, and regression equation of lumbar lordosis (LL) using PI or SIP were obtained. The intraclass correlation coefficient (ICC) was calculated as an evaluation of the measurement reliability. Results Reliability analysis showed high intra- and inter-rater agreements in all the spinopelvic parameters, with ICCs > 0.9. The SIP and pelvic inclination angle (PIA) demonstrated strong correlation with PI (R = 0.96) and pelvic tilt (PT) (R = 0.92). PI could be predicted according to the regression equation: PI = − 9.92 + 0.905 * SIP (R = 0.9596, p < 0.0001). The ideal LL could be predicted using the following equation using PI and age: ideal LL = 32.33 + 0.623 * PI – 0.280 * age (R = 0.6033, p < 0.001) and using SIP and age: ideal LL = 24.29 + 0.609 * SIP – 0.309 * age (R = 0.6177, p < 0.001). Conclusions Both SIP and PIA were reliable parameters for determining the morphology and orientation of the pelvis, respectively. Ideal LL was accurately predicted using the SIP with equal accuracy as the PI. Our findings will assist clinicians in the assessment of spinopelvic sagittal alignment. Trial registration This study was retrospectively registered with the UMIN Clinical Trials Registry (UMIN000042979; January 13, 2021).

scholarly journals RELATIONSHIP OF PELVIC ALIGNMENT WITH BALANCE AND GAIT IN PATIENTS WITH STROKE: A SYSTEMATIC REVIEW

2021 ◽  
pp. 1-9
Author(s):  
Ashwini Mishra ◽  
Dr. Suvarna Ganvir
Keyword(s):  
Observational Studies ◽  
Pelvic Tilt ◽  
Balance Control ◽  
Lateral Displacement ◽  
Weight Bearing ◽  
Lower Limbs ◽  
Pelvic Inclination ◽  
Base Of Support ◽  
Relationship Of ◽  
Pelvic Instability

Background- Pelvis is the key structure that connects the spine and the lower limbs. Altered Pelvic Alignment and asymmetrical weight bearing on affected lower limbs is a common problem leading to pelvic instability which may have an effect on balance and gait in patients with stroke. Hence, it was aimed to investigate the interdependence of these three components in patients with stroke. Methods- Four databases (PubMed, Google Scholar, Cochrane, Science Direct) were searched to identify eligible studies using the keywords Pelvic Alignment, Gait, Balance, Stroke. Only observational studies published in last 10 years (2010-2020) were included in this review. Results- Thirteen studies were included in the review conducted on sub-acute and chronic stage. All studies investigated the affection of pelvic mal-alignment, balance and gait in combination of two variables except 3 studies which investigated the combined effect of pelvic inclination on both balance and gait. The abnormal pelvic tilt results in lateral displacement of the pelvis on affected side, altered Base of Support, reduced balance control, asymmetry in weight bearing leading to altered gait. Conclusion- Pelvic tilt, anterior and lateral has a significant impact on static balance, gait variables, weight bearing symmetry.

scholarly journals Relations between Posture and Trunk Muscle Functions in Girls with Idiopathic Scoliosis

2019 ◽  
Vol 2 (17) ◽  
Author(s):  
Lina Budrienė ◽  
Romualdas Sinkevičius ◽  
Tomas Aukštikalnis ◽  
Indrė Ščiukaitė
Keyword(s):  
Idiopathic Scoliosis ◽  
Comprehensive Evaluation ◽  
Trunk Muscle ◽  
Stability Test ◽  
Trunk Muscles ◽  
Lateral Deviation ◽  
Trunk Stability ◽  
Surface Rotation ◽  
Trunk Inclination ◽  
Muscle Functions

Background. Idiopathic scoliosis (IS) affects 1–3% of children aged 10–16 years (Weinstein et al., 2008). It is important to make comprehensive evaluation and treatment of IS because it provokes health problems and progresses (Negrini et al., 2006). There is a lack of research on muscle impairments, their relations with posture in IS (Parent, Ritchter, 2016). Aim – to assess relations between posture and trunk muscle functions in schoolaged girls with IS. Methods. The study included 20 patients with IS. Anthropometric measurements, measurements of posture (habitual standing posture, posture performing auto-correction and performing Matthias test), functional trunk stability evaluation, trunk muscle static endurance tests were used. Results. After performing auto-correction, thoracic kyphosis signifcantly decreased. Measurements showed decreased static trunk muscle endurance, normal proportions between trunk muscle groups: 75% of subjects have trunk instability. Trunk inclination, left major surface rotation statistically signifcantly changed in functional trunk stability test. Statistical moderate correlations were determined between both side trunk muscle static endurance and: medium surface rotation, major left surface rotation, medium lateral deviation. Also between Cobb angle and static endurance of left side trunk muscles. Changes of major left surface rotation in functional trunk stability test correlated with static endurance ratio of both sides trunk muscles. Statistical strong correlation was determined between major right lateral deviation and both sides muscles static endurance. Conclusions. School-aged girls with IS change kyphosis after auto-correction have low static endurance of trunk muscles and dysfunction of functional stability. Statistically moderate and strong correlations between posture parameters and trunk muscle functions were assessed.Keywords: posture, trunk muscle functions, idiopathic scoliosis, school-aged girls.

scholarly journals Subject-Specific Spino-Pelvic Models Reliably Measure Spinal Kinematics During Seated Forward Bending in Adult Spinal Deformity

2021 ◽  
Vol 9 ◽  
Author(s):  
Thomas Overbergh ◽  
Pieter Severijns ◽  
Erica Beaucage-Gauvreau ◽  
Thijs Ackermans ◽  
Lieven Moke ◽  
...  
Keyword(s):  
Spinal Deformity ◽  
Adult Spinal Deformity ◽  
Intraclass Correlation ◽  
Trunk Flexion ◽  
Retest Reliability ◽  
Pelvic Inclination ◽  
Spine Kinematics ◽  
Subject Specific ◽  
Test Retest Reliability ◽  
Kinematic Simulations

Image-based subject-specific models and simulations are recently being introduced to complement current state-of-the-art mostly static insights of the adult spinal deformity (ASD) pathology and improve the often poor surgical outcomes. Although the accuracy of a recently developed subject-specific modeling and simulation framework has already been quantified, its reliability to perform marker-driven kinematic analyses has not yet been investigated. The aim of this work was to evaluate the reliability of this subject-specific framework to measure spine kinematics in ASD patients, in terms of 1) the overall test-retest repeatability; 2) the inter-operator agreement of spine kinematic estimates; and, 3) the uncertainty of those spine kinematics to operator-dependent parameters of the framework. To evaluate the overall repeatability 1], four ASD subjects and one control subject participated in a test-retest study with a 2-week interval. At both time instances, subject-specific spino-pelvic models were created by one operator to simulate a recorded forward trunk flexion motion. Next, to evaluate inter-operator agreement 2], three trained operators each created a model for three ASD subjects to simulate the same forward trunk flexion motion. Intraclass correlation coefficients (ICC’s) of the range of motion (ROM) of conventional spino-pelvic parameters [lumbar lordosis (LL), sagittal vertical axis (SVA), thoracic kyphosis (TK), pelvic tilt (PT), T1-and T9-spino-pelvic inclination (T1/T9-SPI)] were used to evaluate kinematic reliability 1] and inter-operator agreement 2]. Lastly, a Monte-Carlo probabilistic simulation was used to evaluate the uncertainty of the intervertebral joint kinematics to operator variability in the framework, for three ASD subjects 3]. LL, SVA, and T1/T9-SPI had an excellent test-retest reliability for the ROM, while TK and PT did not. Inter-operator agreement was excellent, with ICC values higher than test-retest reliability. These results indicate that operator-induced uncertainty has a limited impact on kinematic simulations of spine flexion, while test-retest reliability has a much higher variability. The definition of the intervertebral joints in the framework was identified as the most sensitive operator-dependent parameter. Nevertheless, intervertebral joint estimations had small mean 90% confidence intervals (1.04°–1.75°). This work will contribute to understanding the limitations of kinematic simulations in ASD patients, thus leading to a better evaluation of future hypotheses.

scholarly journals Sacral incidence to pubis: a novel and alternative morphologic radiological parameter to pelvic incidence in assessing spinopelvic sagittal alignment

2021 ◽  
Author(s):  
Yasuhito Takahashi ◽  
Kei Watanabe ◽  
Masashi Okamoto ◽  
Shun Hatsushikano ◽  
Kazuhiro Hasegawa ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Pelvic Incidence ◽  
Sagittal Alignment ◽  
Intraclass Correlation ◽  
Hip Dislocation ◽  
Standing Position ◽  
Regression Equation ◽  
Whole Body ◽  
Spinopelvic Parameters ◽  
Pelvic Inclination

Abstract Background: Although pelvic incidence (PI) is a key morphologic parameter in assessing spinopelvic sagittal alignment, accurate measurements of PI become difficult in patients with severe hip dislocation or femoral head deformities. This study aimed to investigate the reliability of our novel morphologic parameters and the correlations with established sagittal spinopelvic parameters. Methods: One hundred healthy volunteers (25 male and 75 female), with an average age of 38.9 years, were analysed. Whole-body alignment in the standing position was measured using a slot-scanning X-ray imager. We measured the established spinopelvic sagittal parameters and a novel parameter: the sacral incidence to pubis (SIP). The correlation coefficient of each parameter, regression equation of PI using SIP, and regression equation of lumbar lordosis (LL) using PI or SIP were obtained. The intraclass correlation coefficient (ICC) was calculated as an evaluation of the measurement reliability. Results: Reliability analysis showed high intra- and inter-rater agreements in all the spinopelvic parameters, with ICCs > 0.9. The SIP and pelvic inclination angle (PIA) demonstrated strong correlation with PI ( R = 0.96) and pelvic tilt (PT) ( R = 0.92). PI could be predicted according to the regression equation: PI = –9.92 + 0.905 * SIP ( R = 0.9596, p < 0.0001). The ideal LL could be predicted using the following equation using PI and age: ideal LL = 32.33 + 0.623 * PI – 0.280 * age ( R = 0.6033, p < 0.001) and using SIP and age: ideal LL = 24.29 + 0.609 * SIP – 0.309 * age ( R = 0.6177, p < 0.001). Conclusion: Both SIP and PIA were reliable parameters for determining the morphology and orientation of the pelvis, respectively. Ideal LL was accurately predicted using the SIP with equal accuracy as the PI. Our findings will assist clinicians in the assessment of spinopelvic sagittal alignment.

Pelvic incidence and pelvic tilt can be calculated using either the femoral heads or acetabular domes in patients with hip osteoarthritis

2021 ◽  
Vol 103-B (8) ◽  
pp. 1345-1350
Author(s):  
Maria Czubak-Wrzosek ◽  
Zaneta Nitek ◽  
Paweł Sztwiertnia ◽  
Jaroslaw Czubak ◽  
Dariusz Grzelecki ◽  
...  
Keyword(s):  
Pelvic Tilt ◽  
Pelvic Incidence ◽  
Interobserver Reliability ◽  
Intraclass Correlation ◽  
Hip Osteoarthritis ◽  
Intraobserver Reproducibility ◽  
Group I ◽  
Femoral Heads ◽  
Group Ii ◽  
Standard Error Of Measurement

Aims The aim of the study was to compare two methods of calculating pelvic incidence (PI) and pelvic tilt (PT), either by using the femoral heads or acetabular domes to determine the bicoxofemoral axis, in patients with unilateral or bilateral primary hip osteoarthritis (OA). Methods PI and PT were measured on standing lateral radiographs of the spine in two groups: 50 patients with unilateral (Group I) and 50 patients with bilateral hip OA (Group II), using the femoral heads or acetabular domes to define the bicoxofemoral axis. Agreement between the methods was determined by intraclass correlation coefficient (ICC) and the standard error of measurement (SEm). The intraobserver reproducibility and interobserver reliability of the two methods were analyzed on 31 radiographs in both groups to calculate ICC and SEm. Results In both groups, excellent agreement between the two methods was obtained, with ICC of 0.99 and SEm 0.3° for Group I, and ICC 0.99 and SEm 0.4° for Group II. The intraobserver reproducibility was excellent for both methods in both groups, with an ICC of at least 0.97 and SEm not exceeding 0.8°. The study also revealed excellent interobserver reliability for both methods in both groups, with ICC 0.99 and SEm 0.5° or less. Conclusion Either the femoral heads or acetabular domes can be used to define the bicoxofemoral axis on the lateral standing radiographs of the spine for measuring PI and PT in patients with idiopathic unilateral or bilateral hip OA. Cite this article: Bone Joint J 2021;103-B(8):1345–1350.

scholarly journals The Immediate Effect of Anterior Pelvic Tilt Taping on Pelvic Inclination

2011 ◽  
Vol 23 (2) ◽  
pp. 201-203 ◽  
Author(s):  
Jung-Hoon Lee ◽  
Won-Gyu Yoo ◽  
Hwang-Bo Gak
Keyword(s):  
Pelvic Tilt ◽  
Pelvic Inclination ◽  
Anterior Pelvic Tilt
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