The influence of foot hyperpronation on pelvic biomechanics during stance phase of the gait: A biomechanical simulation study

2018 ◽  
Vol 232 (7) ◽  
pp. 708-717 ◽  
Author(s):  
Farzaneh Yazdani ◽  
Mohsen Razeghi ◽  
Mohammad Taghi Karimi ◽  
Hadi Raeisi Shahraki ◽  
Milad Salimi Bani
Keyword(s):  
Degrees Of Freedom ◽  
Stance Phase ◽  
Pelvic Tilt ◽  
Sagittal Plane ◽  
Principal Component ◽  
Control Group ◽  
Low Back ◽  
Pelvic Inclination ◽  
Anterior Pelvic Tilt ◽  
Component Scores

Despite the theoretical link between foot hyperpronation and biomechanical dysfunction of the pelvis, the literature lacks evidence that confirms this assumption in truly hyperpronated feet subjects during gait. Changes in the kinematic pattern of the pelvic segment were assessed in 15 persons with hyperpronated feet and compared to a control group of 15 persons with normally aligned feet during the stance phase of gait based on biomechanical musculoskeletal simulation. Kinematic and kinetic data were collected while participants walked at a comfortable self-selected speed. A generic OpenSim musculoskeletal model with 23 degrees of freedom and 92 muscles was scaled for each participant. OpenSim inverse kinematic analysis was applied to calculate segment angles in the sagittal, frontal and horizontal planes. Principal component analysis was employed as a data reduction technique, as well as a computational tool to obtain principal component scores. Independent-sample t-test was used to detect group differences. The difference between groups in scores for the first principal component in the sagittal plane was statistically significant (p = 0.01; effect size = 1.06), but differences between principal component scores in the frontal and horizontal planes were not significant. The hyperpronation group had greater anterior pelvic tilt during 20%–80% of the stance phase. In conclusion, in persons with hyperpronation we studied the role of the pelvic segment was mainly to maintain postural balance in the sagittal plane by increasing anterior pelvic inclination. Since anterior pelvic tilt may be associated with low back symptoms, the evaluation of foot posture should be considered in assessing the patients with low back and pelvic dysfunction.

Effect of prosthetic ankle units on the gait of persons with bilateral trans-femoral amputations

2008 ◽  
Vol 32 (1) ◽  
pp. 111-126 ◽  
Author(s):  
Lexyne L. McNealy ◽  
Steven A. Gard
Keyword(s):  
Power Generation ◽  
Range Of Motion ◽  
Ankle Joint ◽  
Lower Limb ◽  
Stance Phase ◽  
Sagittal Plane ◽  
The Body ◽  
Control Group ◽  
Initial Contact ◽  
Ankle Motion

In able-bodied individuals, the ankle joint functions to provide shock absorption, aid in foot clearance during the swing phase, and provides a rocker mechanism during stance phase to facilitate forward progression of the body. Prosthetic ankles currently used by persons with lower limb amputations provide considerably less function than their anatomical counterparts. However, increased ankle motion in the sagittal plane may improve the gait of persons with lower limb amputations while providing a more versatile prosthesis. The primary aim of this study was to examine and quantify temporal-spatial, kinematic, and kinetic changes in the gait of four male subjects with bilateral trans-femoral amputations who walked with and without prosthetic ankle units. Two prosthesis configurations were examined: (i) Baseline with only two Seattle LightFoot2 prosthetic feet, and (ii) with the addition of Endolite Multiflex Ankle units. Data from the gait analyses were compared between prosthetic configurations and with a control group of able-bodied subjects. The amputee subjects' freely-selected walking speeds, 0.74 ± 0.19 m/s for the Baseline condition and 0.81 ± 0.15 m/s with the ankle units, were much less than that of the control subjects (1.35 ± 0.10 m/s). The amputee subjects demonstrated no difference in walking speed, step length, cadence, or ankle, knee, and hip joint moments and powers between the two prosthesis configurations. Sagittal plane ankle range of motion, however, increased by 3–8° with the addition of the prosthetic ankle units. Compared to the control group, following initial contact the amputee subjects passively increased the rate of energy storage or dissipation at the prosthetic ankle joint, actively increased the power generation at the hip, and increased the extension moment at the hip while wearing the prosthetic ankle configuration. The amputee subjects increased the power generation at their hips, possibly as compensation for the reduced rate of energy return at their prosthetic ankles. Results from subject questionnaires administered following the gait analyses revealed that the prosthetic ankle units provided more comfort during gait and did not increase the perceived effort to walk. The subjects also indicated that they preferred walking with the prosthetic ankle units compared to the Baseline configuration. The results of the study showed that the prosthetic ankle units improved sagittal plane ankle range of motion and increased the comfort and functionality of the amputee subjects’ prostheses by restoring a significant portion of the ankle rocker mechanism during stance phase. Therefore, prosthetic ankle mechanisms should be considered a worthwhile option when prostheses are prescribed for persons with trans-femoral amputations.

scholarly journals Nyeri Punggung Bawah Akibat Posisi Duduk yang Salah Pada Pesepeda

2020 ◽  
Vol 5 (2) ◽  
pp. 71-88
Author(s):  
Zahra Salsabila Hafid ◽  
Ummy Aisyah N ◽  
Parmono Dwi Putro
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Lower Back Pain ◽  
Pelvic Tilt ◽  
Research Articles ◽  
Sitting Position ◽  
Low Back ◽  
Lumbar Flexion ◽  
Lower Back ◽  
Anterior Pelvic Tilt

Background: Lower back pain still occurs in many cyclists. The sitting position is considered to be one of the factors causing complaints of low back pain. This study was conducted to determine the correlation between sitting position and complaints of low back pain in cyclists. Methods: This study employed the narrative review method by collecting ten research articles from the Google Scholar and PubMed databases, identifying keywords using the PEOs format, so that the keywords "Cyclist", "Sitting Position", "Lower Back Pain", and "All Study Design" were used. Results: All articles used were articles published starting in 2010. Seven articles stated that lower back pain occurred more frequently in a sitting position with large lumbar flexion. Six articles stated that the sitting position of a cyclist was affected by the position of the handlebars. Five articles stated that sitting with the lower handlebars resulted in greater lumbar flexion and anterior pelvic tilt. Five articles stated that prolonged lumbar flexion and anterior pelvic tilt resulted in a lower crossed syndrome. Four articles found that lower crossed syndrome contributes to lower back pain. Conclusion: There is a correlation between sitting position and complaints of low back pain in cyclists. However, there are limitations to the article which states that the statistical closeness of the correlation between sitting position and complaints of low back pain in cyclists.

Kinematic and Kinetic Constraints on Arm, Trunk, and Leg Segments in Target-Reaching Movements

2005 ◽  
Vol 93 (1) ◽  
pp. 352-364 ◽  
Author(s):  
James S. Thomas ◽  
Daniel M. Corcos ◽  
Ziaul Hasan
Keyword(s):  
Degrees Of Freedom ◽  
Neural Control ◽  
Time Course ◽  
Sagittal Plane ◽  
Principal Component ◽  
Joint Torque ◽  
Trunk Flexion ◽  
Joint Torques ◽  
Joint Task ◽  
Task Conditions

We studied target reaching tasks involving not only the arms but also the trunk and legs, which necessitated some trunk flexion. Such tasks can be successfully completed using an infinite number of combinations of segment motions due to the inherent kinematic redundancy with the excessive degrees of freedom (DOFs). Sagittal plane motions of six segments (shank, thigh, pelvis, trunk, humerus, and forearm) and dynamic torques of six joints (ankle, knee, hip, lumbar, shoulder, and elbow) were analyzed separately by principal component (PC) analyses to determine if there was a commonality among the shapes of the respective waveforms. Additionally, PC analyses were used to probe for constraining relationships among the 1) relative magnitudes of segment excursions and 2) the peak-to-peak dynamic joint torques. In summary, at the kinematic level, the tasks are simplified by the use of a single common waveform for all segment excursions with 89.9% variance accounted for (VAF), but with less fixed relationships among the relative scaling of the magnitude of segment excursions (62.2% VAF). However, at the kinetic level, the time course of the dynamic joint torques are not well captured by a single waveform (72.7% VAF), but the tasks are simplified by relatively fixed relationships among the scaling of dynamic joint torque magnitudes across task conditions (94.7% VAF). Taken together, these results indicate that, while the effective DOFs in a multi-joint task are reduced differently at the kinematic and kinetic levels, they both contribute to simplifying the neural control of these tasks.

scholarly journals MEASUREMENT OF ANTERIOR PELVIC TILT IN LOW BACK PAIN- AN OBSERVATIONAL STUDY

2017 ◽  
Vol 10 (4) ◽  
pp. 115
Author(s):  
Devadhason Malarvizhi ◽  
Sai Kishore Varma ◽  
Sivakumar Vpr
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Visual Analogue Scale ◽  
Analogue Scale ◽  
Pelvic Tilt ◽  
Low Back ◽  
Anterior Pelvic Tilt ◽  
Males And Females ◽  
Highly Correlated ◽  
Pain Patients

OBJECTIVE: The objective of the study was to measure the anterior pelvic tilt for both males and females of low back pain patients.  STUDY DESIGN:  Observational type. PROCEDURE: 120 subjects were approached. In that 70 male and 50 females . Using i@handy application in mobile anterior pelvic tilt was calculated among low back pain patients.RESULTS: Anterior pelvic tilt was increased in low back pain patients . In that correlation between males and Visual analogue scale was not significant. But there was a significant correlation found in female anterior pelvic tilt and Visual analogue scale.CONCLUSION:  This study concluded that there was increase in anterior pelvic tilt among low back pain patients. Anterior pelvic tilt and Visual analogue scale was highly correlated in females not in males.KEYWORDS: i@handy, Anterior pelvic tilt, low back pain.

scholarly journals Effects of Proprioceptive Neuromuscular Facilitation Stretching and Kinesiology Taping on Pelvic Compensation During Double-Knee Extension

2015 ◽  
Vol 49 (1) ◽  
pp. 55-64 ◽  
Author(s):  
Seung-Woong Lee ◽  
Jung-Hoon Lee
Keyword(s):  
Muscle Activity ◽  
Pelvic Tilt ◽  
Knee Extension ◽  
Control Group ◽  
Proprioceptive Neuromuscular Facilitation ◽  
Anterior Pelvic Tilt ◽  
Movement Distance ◽  
Baseline Values ◽  
Group Control Group ◽  
Experimental Group

Abstract Shortened hamstrings are likely to restrict the anterior pelvic tilt and induce a slumped posture due to the posterior pelvic tilt. This study was conducted to compare the effects of proprioceptive neuromuscular facilitation (PNF) stretching and modified anterior pelvic tilt taping (APTT) on hamstring shortness-associated pelvic compensation while executing seated double-knee extension. Male college students (28 healthy young adults; mean age: 21.4 ± 2.1 years) with hamstring shortness were recruited as study subjects and randomly assigned to either the PNF stretching group (control group) or the APTT group (experimental group). In all the subjects, changes in the movement distance of the centre of gluteal pressure (COGP) as well as rectus abdominis (RA) and semitendinosus (SEM) muscle activities were measured during seated double-knee extension while the respective intervention method was applied. Both groups showed significant decreases in COGP distance and RA muscle activity compared with their respective baseline values (p < 0.05), however, no significant changes were observed in SEM muscle activity. We can infer that not only a direct intervention on the hamstring, such as PNF stretching, but also a modified APTT-mediated pelvic intervention may be used as a method for reducing pelvic compensation induced by hamstring shortness.

scholarly journals Non-surgical interventions for excessive anterior pelvic tilt in symptomatic and non-symptomatic adults: a systematic review

2020 ◽  
Vol 5 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Anders Falk Brekke ◽  
Søren Overgaard ◽  
Asbjørn Hróbjartsson ◽  
Anders Holsgaard-Larsen
Keyword(s):  
Surgical Treatment ◽  
Pelvic Tilt ◽  
Clinical Symptoms ◽  
Risk Of Bias ◽  
Low Back ◽  
Surgical Interventions ◽  
Anterior Pelvic Tilt ◽  
Grade Approach ◽  
Non Surgical Treatment

Excessive anterior pelvic tilt is suspected of causing femoroacetabular impingement, low back pain, and sacroiliac joint pain. Non-surgical treatment may decrease symptoms and is seen as an alternative to invasive and complicated surgery. However, the effect of non-surgical modalities in adults is unclear. The aim of this review was to investigate patient- and observer-reported outcomes of non-surgical intervention in reducing clinical symptoms and/or potential anterior pelvic tilt in symptomatic and non-symptomatic adults with excessive anterior pelvic tilt, and to evaluate the certainty of evidence. MEDLINE, EMBASE, Web of Science and Cochrane (CENTRAL) databases were searched up to March 2019 for eligible studies. Two reviewers assessed risk of bias independently, using the Cochrane Risk of Bias tool for randomized trials and the ROBINS-I tool for non-randomized studies. Data were synthesized qualitatively. The GRADE approach was used to assess the overall certainty of evidence. Of 2013 citations, two randomized controlled trials (RCTs) (n = 72) and two non-RCTs (n = 23) were included. One RCT reported a small reduction (< 2°) in anterior pelvic tilt in non-symptomatic men. The two non-RCTs reported a statistically significant reduction in anterior pelvic tilt, pain, and disability in symptomatic populations. The present review was based on heterogeneous study populations, interventions, and very low quality of evidence. No overall evidence for the effect of non-surgical treatment in reducing excessive anterior pelvic tilt and potentially related symptoms was found. High-quality studies targeting non-surgical treatment as an evidence-based alternative to surgical interventions for conditions related to excessive anterior pelvic tilt are warranted. Cite this article: EFORT Open Rev 2020;5:37-45. DOI: 10.1302/2058-5241.5.190017

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

scholarly journals Dynamic Between-Leg Differences While Walking in Anterior Cruciate Ligament–Deficient Patients With and Without Medial Meniscal Posterior Horn Tears

2020 ◽  
Vol 8 (5) ◽  
pp. 232596712091905
Author(s):  
Shuang Ren ◽  
Huijuan Shi ◽  
Yuanyuan Yu ◽  
Zixuan Liang ◽  
Yanfang Jiang ◽  
...  
Keyword(s):  
Stance Phase ◽  
Sagittal Plane ◽  
Cruciate Ligament ◽  
Knee Kinematics ◽  
Control Group ◽  
Control Groups ◽  
Response Phase ◽  
Anterior Cruciate ◽  
And Control ◽  
Anterior Cruciate Ligament Deficient

Background: Patients with anterior cruciate ligament–deficient (ACLD) knees with medial meniscal posterior horn tears (MMPHTs) have been reported to demonstrate a combined stiffening and pivot-shift gait pattern compared with healthy controls. Movement asymmetries are implicated in the development and progression of osteoarthritis. Purpose: To investigate the knee kinematics and kinetic asymmetries in ACLD patients with (ACLD + MMPHT group) and without (ACLD group) MMPHTs while walking on level ground. Study Design: Cross-sectional study; Level of evidence, 3. Methods: A total of 15 patients with isolated unilateral ACL ruptures, 10 with unilateral ACL ruptures and MMPHTs, and 22 healthy controls underwent gait testing between January 2014 and December 2016. Between-leg differences (BLDs) in knee kinematics and kinetics were compared among participants in all groups. Results: The ACLD + MMPHT group demonstrated significantly greater BLDs in knee moments in the sagittal plane during the loading response phase than the ACLD and control groups. Compared with the control group, the ACLD and ACLD + MMPHT groups demonstrated significantly greater BLDs in knee angles in the sagittal plane during the midstance and terminal stance phases. Compared with the control group, significantly greater BLDs in knee rotation moments were found throughout the stance phase in both the ACLD and the ACLD + MMPHT groups. BLDs in lateral ground-reaction forces (GRFs) in the ACLD + MMPHT and ACLD groups were both significantly greater than the control group during the loading response phase. BLDs in anterior GRFs in the ACLD + MMPHT and ACLD groups were both significantly greater than the control group during the loading response phase. Only the ACLD + MMPHT group demonstrated greater BLDs in vertical GRFs than the control group during the loading response phase, while no significant differences were observed between the ACLD and control groups. Conclusion: The ACLD + MMPHT group demonstrated significantly more knee flexion moment asymmetries than the ACLD and control groups during the loading response phase. Both the ACLD + MMPHT and the ACLD groups demonstrated significant knee angle and moment asymmetries in the sagittal plane during the terminal stance phase than the control group. Both the ACLD + MMPHT and the ACLD groups demonstrated knee rotation moment asymmetries during the midstance and terminal stance phases compared with the control group. A rehabilitation program for ACLD patients both with and without MMPHTs should take into consideration these asymmetric gait patterns.

scholarly journals Trunk stabilization during sagittal pelvic tilt: from trunk-on-pelvis to trunk-in-space due to vestibular and visual feedback

2016 ◽  
Vol 115 (3) ◽  
pp. 1381-1388 ◽  
Author(s):  
Paul van Drunen ◽  
Frans C. T. van der Helm ◽  
Jaap H. van Dieën ◽  
Riender Happee
Keyword(s):  
Visual Feedback ◽  
Pelvic Tilt ◽  
Sagittal Plane ◽  
Task Instruction ◽  
Body Sway ◽  
Low Back ◽  
Flexion Extension ◽  
Trunk Sway ◽  
Eyes Open ◽  
Trunk Stabilization

The goal of this study was to investigate the human ability to stabilize the trunk in space during pelvic tilt. Upper body sway was evoked in kneeling-seated healthy subjects by angular platform perturbations with a rotation around a virtual low-back pivot point between the L4 and L5 vertebrae. To investigate motor control modulation, variations in task instruction (balance naturally or minimize trunk sway), vision (eyes open or closed), and perturbation bandwidth (from 0.2 up to 1, 3, or 10 Hz) were applied. Cocontraction and proprioceptive muscle spindle feedback were associated with minimizing low-back flexion/extension (trunk-on-pelvis stabilization), while vestibular and visual feedback were supposed to contribute to trunk-in-space stabilization. Trunk-in-space stabilization was only observed with the minimize trunk sway task instruction, while the task instruction to balance naturally led to trunk-on-pelvis stabilization with trunk rotations even exceeding the perturbations. This indicates that vestibular feedback is used when minimizing trunk sway but has only a minor contribution during natural trunk stabilization in the sagittal plane. The eyes open condition resulted in reduced global trunk rotations and increased global trunk reflexive responses, demonstrating effective visual contributions to trunk-in-space stabilization. On the other hand, increasing perturbation bandwidth caused a decreased feedback contribution leading to deteriorated trunk-in-space stabilization.

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