scholarly journals The Relationship Between Foot and Pelvic Alignment While Standing

2015 ◽  
Vol 46 (1) ◽  
pp. 85-97 ◽  
Author(s):  
Sam Khamis ◽  
Gali Dar ◽  
Chava Peretz ◽  
Ziva Yizhar
Keyword(s):  
Internal Rotation ◽  
Pelvic Tilt ◽  
Cumulative Effect ◽  
Normal Function ◽  
Repeated Measure ◽  
Postural Adjustment ◽  
Motion Analysis System ◽  
Anterior Pelvic Tilt ◽  
Analysis System ◽  
The Relationship

AbstractA normal motion and segmental interrelationship has been determined as a significant factor in normal function. Yet, the relationship between distal segments and pelvic alignment needs further investigation. The aim of this study was to investigate the interrelationship between distal and proximal lower extremity segments while standing and during induced feet hyperpronation. Changes in alignment of the pelvis and lower extremities were measured at a gait laboratory using the VICON 612 computerized motion analysis system. Thirty-five healthy volunteer subjects were recruited. Four randomized repeated-measure standing modes were used: standing directly on the floor and then on three wedges angled at 10°, 15° and 20° to induce bilateral hyperpronation for 20 seconds. A significant (p<0.05) bi-variate relationship was found between the anterior pelvic tilt and thigh internal rotation, in all four standing positions (.41≤r≤.46, in all p<0.014). A combined effect of rotational alignment between segments and the cumulative effect of foot hyperpronation on pelvic tilt revealed that only the shank significantly affected pelvic alignment, acting as a mediator between a foot and a thigh with the thigh having a crude significant effect on the pelvis. When internal rotation of the shank occurs, calcaneal eversion couples with thigh internal rotation and anterior pelvic tilt. It can be concluded that in response to induced hyperpronation, the shank is a pivotal segment in postural adjustment.

scholarly journals Botulinum Toxin Type A Injections Impact Hamstring Muscles and Gait Parameters in Children with Flexed Knee Gait

Toxins ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 145
Author(s):  
Seung Ki Kim ◽  
Dong Wook Rha ◽  
Eun Sook Park
Keyword(s):  
Botulinum Toxin ◽  
Internal Rotation ◽  
Motor Function ◽  
Pelvic Tilt ◽  
Botulinum Toxin Type A ◽  
Botulinum Toxin Type ◽  
Knee Extension ◽  
Tendon Length ◽  
Anterior Pelvic Tilt ◽  
Hip Internal Rotation

The aim of this study was to determine if botulinum toxin type A (BoNT-A) injection into the medial hamstring can improve gait kinematics and muscle-tendon length in spastic cerebral palsy (CP) with a flexed knee gait (FKG). Twenty-nine children with spastic CP (Gross Motor Function Classification System I–III) with FKG were recruited for this prospective study. BoNT-A was injected into the semitendinosus and semimembranosus (SM) muscles under ultrasonography guidance. Assessments included Gross Motor Function Measure (GMFM), Modified Ashworth Scale (MAS), Modified Tardieu Scale (MTS), 3-dimensional computerized gait analysis, calculated SM muscle-tendon length and lengthening velocity during gait using musculoskeletal modeling at baseline, 4 and 16 weeks after the injection. Compared to baseline data, significant improvements in GMFM, MAS, and MTS were demonstrated at weeks 4 and 16, and also a significant increase in maximum knee extension during the stance phase was observed at week 4. In addition, the mean lengthening velocity during the swing phase was increased at week 16 without a change in the SM muscle length. Furthermore, there was a significant increase in anterior pelvic tilt at week 4, compared to baseline data. The significant decrease in hip internal rotation after injection was observed only in children with excessive hip internal rotation at initial contact before injection. BoNT-A injection into hamstrings leads to a significant increase in knee extension and anterior pelvic tilt with an increase in lengthening velocity of SM in spastic CP with FKG.

scholarly journals The relationship between anterior pelvic tilt and gait, balance in patient with chronic stroke

2017 ◽  
Vol 30 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Myoung-Kwon Kim ◽  
Seong-Gil Kim ◽  
Young-Jun Shin ◽  
Eun-Hong Choi ◽  
Yu-Won Choe
Keyword(s):  
Pelvic Tilt ◽  
Chronic Stroke ◽  
Anterior Pelvic Tilt ◽  
The Relationship

scholarly journals Effect of Decreasing the Anterior Pelvic Tilt on Range of Motion in Femoroacetabular Impingement: A Computer-Simulation Study

2021 ◽  
Vol 9 (4) ◽  
pp. 232596712199946
Author(s):  
Naomi Kobayashi ◽  
Shota Higashihira ◽  
Haruna Kitayama ◽  
Emi Kamono ◽  
Yohei Yukizawa ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Range Of Motion ◽  
Internal Rotation ◽  
Pelvic Tilt ◽  
Simulation Models ◽  
Change Model ◽  
Anterior Pelvic Tilt ◽  
Computer Simulation Models ◽  
Cam Resection ◽  
Tilt Change

Background: The influence of pelvic tilt mobility, which can be reproduced in computer-simulation models, is an important subject to be addressed in the understanding of femoroacetabular impingement (FAI) pathophysiology. Purpose: To use computer-simulation models of FAI cases to evaluate the optimum improvement in hip range of motion (ROM) achieved by decreasing the anterior pelvic tilt and compare the results with the improvement in ROM achieved after cam resection surgery. Study Design: Controlled laboratory study. Methods: The pre- and postoperative computed tomography (CT) images from 28 patients with FAI treated with arthroscopic cam resection were evaluated. Using a dynamic computer-simulation program, 3-dimensional models with a 5° and a 10° decrease in anterior pelvic tilt from the supine functional pelvic plane (baseline) were created from the preoperative CT scans. Similar models were constructed for hips before (at baseline) and after cam resection. Improvements from baseline in maximum internal rotation at 45°, 70°, and 90° of flexion were assessed for the 5° change in pelvic tilt, 10° change in pelvic tilt, and cam resection models, and the results were compared for all conditions. Results: The combination of a 10° change in pelvic tilt and cam resection showed the largest ROM improvement from baseline ( P < .001). Improvement in internal rotation in the cam resection model was significantly higher compared with the 5° pelvic tilt change model ( P < .001), while there was no significant difference between the cam resection model and the 10° pelvic tilt change model. Conclusion: Decreasing anterior pelvic tilt by 10° in the preoperative computer simulation model resulted in an equivalent effect to cam resection, while a 5° change in pelvic tilt was inferior to cam resection in terms of ROM improvement. Clinical Relevance: Enough of a decrease in anterior pelvic tilt may contribute to ROM improvement that is as effective as that of cam resection surgery.

ANALYSIS OF CORRELATION BETWEEN AIMING ADJUSTMENT TRAJECTORY AND TARGET

2005 ◽  
Vol 05 (02) ◽  
pp. 253-259
Author(s):  
KUO-BIN LIN ◽  
CHI-KUANG HWANG
Keyword(s):  
Performance Analysis ◽  
Negative Correlation ◽  
Video Camera ◽  
The Other ◽  
Motion Analysis System ◽  
Positive Correlation ◽  
Adjustment Procedure ◽  
Digital Video Camera ◽  
Analysis System ◽  
The Relationship

In archery, there is the relationship among stability of the archer, adjustments made during the aiming procedure, and the targeting coordination. Twelve specialists from the male archery team of National College of Physical Education and Sports took part in this research, with 12 arrows sets up at a distance of 70 m. A laser pen is located on the bow handle for capturing the trajectory of the aiming procedure with a digital video camera, and the other camera for the coordination of target. The Ariel Performance Analysis System motion analysis system is used to obtain the x and y aiming trajectory coordinates for analyzing the correlation. Results of this research were: (1) Ten archers whose variation of the x axis is larger than that of the y axis. (2) There are four archers whose aiming adjustment procedure has all the positive correlation with the target in the x axis, but there are three archers with all negative correlation. (3) In terms of the correlation in the y axis, there are six archers with all positive correlation, but there are two archers with all negative correlation.

scholarly journals Is Hip Muscle Strength Associated with Dynamic Knee Valgus in a Healthy Adult Population? A Systematic Review

2021 ◽  
Vol 18 (14) ◽  
pp. 7669
Author(s):  
Ali Mohammed Alzahrani ◽  
Msaad Alzhrani ◽  
Saeed Nasser Alshahrani ◽  
Wael Alghamdi ◽  
Mazen Alqahtani ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Adult Population ◽  
Knee Valgus ◽  
Journal Articles ◽  
Hip Muscle ◽  
Hip Abductor ◽  
Hip Muscles ◽  
Analysis System ◽  
The Relationship ◽  
External Rotator

This study aimed to systematically review research investigating the association between hip muscle strength and dynamic knee valgus (DKV). Four databases (MEDLINE, PubMed, CINAHL, and SPORTDiscus) were searched for journal articles published from inception to October 2020. Seven studies investigating the association between hip muscle strength and DKV using a two-dimensional motion analysis system in healthy adults were included. The relationship between hip abductor muscle strength and DKV was negatively correlated in two studies, positively correlated in two studies, and not correlated in three studies. The DKV was associated with reduced hip extensor muscle strength in two studies and reduced hip external rotator muscle strength in two studies, while no correlation was found in three and five studies for each muscle group, respectively. The relationship between hip muscle strength, including abductors, extensors, and external rotators and DKV is conflicting. Considering the current literature limitations and variable methodological approaches used among studies, the clinical relevance of such findings should be interpreted cautiously. Therefore, future studies are recommended to measure the eccentric strength of hip muscles, resembling muscular movement during landing. Furthermore, high-demand and sufficiently challenging functional tasks revealing lower limb kinematic differences, such as cutting and jumping tasks, are recommended for measuring the DKV.

scholarly journals Investigation of normal knees kinematics in walking and running at different speeds using a portable motion analysis system

2021 ◽  
pp. 1-14
Author(s):  
Rixu Liu ◽  
Dongyang Qian ◽  
Yushu Chen ◽  
Jianyu Zou ◽  
Shicong Zheng ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Motion Analysis System ◽  
Analysis System

scholarly journals The Relationship between Pelvic Tilt Angle and Disability Associated with Low Back Pain

2013 ◽  
Vol 25 (1) ◽  
pp. 65-68 ◽  
Author(s):  
Hee Sung Lim ◽  
Su Yeon Roh ◽  
Suk Min Lee
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Tilt Angle ◽  
Pelvic Tilt ◽  
Low Back ◽  
The Relationship

scholarly journals Effects of body mass index and range of motion on intraoperative change in pelvic tilt during total hip arthroplasty using the direct anterior approach

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Masanori Okamoto ◽  
Masashi Kawasaki ◽  
Toshiaki Okura ◽  
Taisuke Seki ◽  
Shiro Imagama
Keyword(s):  
Body Mass Index ◽  
Logistic Regression ◽  
Total Hip Arthroplasty ◽  
Internal Rotation ◽  
Hip Arthroplasty ◽  
Supine Position ◽  
Anterior Approach ◽  
Pelvic Tilt ◽  
Direct Anterior Approach ◽  
Axial Rotation

Abstract Background Intraoperative pelvic tilt changes that occurs during total hip arthroplasty (THA) in the supine position affects cup placement and sometimes causes malalignment. The relationship between body mass index (BMI) and pelvic movement has been reported for some procedures, but not the direct anterior approach (DAA). The purpose of this study was to investigate intraoperative pelvic tilt changes that occurs during DAA. Methods In this single-center, retrospective study, we reviewed 200 hips that underwent primary THA via DAA in the supine position using an accelerometer-based navigation system. Intraoperative changes in pelvic tilt and axial rotation from the start of surgery to cup placement were assessed using the navigation system. Preoperative clinical factors that increased pelvic tilt and axial rotation toward the surgical side by > 10° were analyzed via univariate and multiple logistic regression analyses. Results The mean pelvic tilt value increased by 7.6° ± 3.8° (95% confidence interval [CI], 7.1–8.2; range, − 5.0–19.0) intraoperatively, and the axial rotation increased by 3.2° ± 2.7° (95% CI, 2.7–3.7; range, − 13.0–12.0). Univariate analysis revealed that the group with increased pelvic tilt showed significantly greater range of abduction and internal rotation, and significantly lower BMI than the group with no increased tilt. Pre-incisional pelvic tilt was significantly greater in the group with increased axial rotation than in the group with no increased rotation. On logistic regression analysis, BMI (odds ratio [OR], 0.889; 95% CI, 0.809–0.977; p = 0.014) and the range of internal rotation (OR, 1.310; 95% CI, 1.002–1.061; p = 0.038) were predictors of large increases in pelvic tilt. No predictors of large increases in axial rotation were identified. Conclusion Significant forward pelvic tilt was observed in patients with a low BMI values and high ranges of internal rotation via THA using the DAA. Findings indicated that surgeons should pay attention to intraoperative pelvic movements, which may help identify patients with significant pelvic tilt changes.

Effect of Vibration on Rapeseed Header Loss and Optimization of Header Frame

2021 ◽  
Vol 64 (4) ◽  
pp. 1247-1258
Author(s):  
Yang Li ◽  
Lizhang Xu ◽  
Zhipeng Gao ◽  
En Lu ◽  
Yaoming Li
Keyword(s):  
Modal Analysis ◽  
Engine Speed ◽  
Vibration Measurement ◽  
List Type ◽  
Positive Correlation ◽  
Combine Harvester ◽  
Analysis System ◽  
Combine Harvesters ◽  
Relationship Of ◽  
The Relationship

HighlightsThe relationship of vibration and header loss was studied by multi-point vibration measurement and loss collection test.There was an approximately linear positive correlation between total header vibration and total rapeseed header loss.The header frame was analyzed and optimized through modal simulation and testing.The total rapeseed header loss of the improved header was reduced by 33.2% to 46.9%.Abstract. In view of the current large rapeseed header losses of rape combine harvesters, the effects of the header on rapeseed header loss were studied from the perspective of vibration. First, the vibrations at various measuring points on the header during rape harvest were studied using a data acquisition and analysis system while performing collection tests of rapeseed header loss with the sample slot method. The relationships between total header vibration and total rapeseed header loss and between vertical cutter vibration and rapeseed vertical cutter loss were shown to have a positive correlation, and they all increased with the increase in engine speed. Vertical cutter loss accounted for 31.2% to 42.4% of the total rapeseed header loss. Modal analysis and optimization of the header frame were then performed by simulation and test. The natural frequencies of the first-order and second-order modes of the optimized header were increased, and the possibility of resonance with other working parts was eliminated. Finally, the improved header was tested during rape harvest. The results showed that the total vibration of the improved header was reduced by 19.9% to 43.9%, and the total rapeseed header loss was reduced by 33.2% to 46.9%. The vertical cutter vibration was reduced by 30.5% to 49.8%, and the rapeseed vertical cutter loss was reduced by 20.8% to 34.7%. In addition, the vibration and rapeseed loss of the improved header had relatively slow rates of increase with the increase in engine speed. The method of reducing rapeseed loss by reducing the header vibration achieved an obvious and positive effect. Keywords: Frame optimization, Modal analysis, Rape combine harvester, Rapeseed header loss, Vibration.

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