Quantifying lateral pelvic displacement during walking (original) (raw)
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Effect of Pelvic Tilt on Gait Parameters in Patients with Stroke
2019
Background: Pelvic asymmetry is commonly observed in stroke subjects. There is increased anterior and Lateral Pel-vic Tilt in patients with a stroke which influences the gait parameters like stride length, step length, step width and the cadence of the stroke subject. Objectives: 1. To measure the pelvic tilt in stroke patients.2. To measure the gait parameters of the stroke patient.<br> Materials and Methods: It was a cross-sectional study conducted on 18 patients with stroke. Anterior and Lateral Pelvic Tilt of stroke subjects were measured using pelvic inclinometer. The deviation in pelvic tilt was measured in degrees. Patients were asked to walk on a given platform with or without assistive device. Following this, Gait param-eters were measured like stride length, step length, step width and cadence. Results: There was a negative correlation between Anterior Pelvic Tilt and stride length, with r-value of -0.8774 and p-value <0.0001 (extremely significant). Step length a...
Relationship of Pelvic Alignment with Balance and Gait in Patients with Stroke: A Systematic Review
International Journal of Clinical and Biomedical Research
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 pelvi...
Pelvis motion characteristics in case of induced gait perturbation in male and female adults
Advances in Rehabilitation, 2019
Introduction: Falls are a serious social problem. The risk of falling is higher for women compared to the male population, which may be resulting from differences in anatomy of the pelvis. Even though there are papers describing pelvis reaction to perturbation differentiating males and females, the perturbation is usually applied in standing position. The study's aim was to compare selected values describing the pelvis motion while gait perturbation and normal walking, having regard to sex differences. Material and methods: The study group included 43 young healthy adults (27 women and 16 men) aged 23±4 years. Motek Grail system was used to record the position of reflective markers placed on subjects' body. Gait perturbation (trip) was induced by decelerating one of the belts of the treadmill integrated with the system. Three-dimensional kinematic parameters for the left leg stance phase, when the perturbation occurred, and the next stance phase of the contralateral leg was analyzed. Statistical analysis was conducted in STATISTICA software using a two-way analysis of variance and Pearson correlation. Results: Statistically significant differences between gait and perturbation were found for each of the analyzed planes. It was also observed that gender influenced the results. Females had greater maximum pelvic tilt and greater rotation to the right compared to men, both for gait and perturbation. Conclusions: Based on the obtained results it can be suggested that differences in the anatomy and biomechanics of the pelvis between male and female may be the reason of higher risk of falling while walking in women compared to the men.
Gait & Posture, 2014
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Clinical Biomechanics, 2010
Background-Foot placement during walking is closely linked to the body position, yet it is typically quantified relative to the other foot. The purpose of this study was to quantify foot placement patterns relative to body post-stroke and investigate its relationship to hemiparetic walking performance. Methods-Thirty-nine participants with hemiparesis walked on a split-belt treadmill at their selfselected speeds and twenty healthy participants walked at matched slow speeds. Anterior-posterior and medial-lateral foot placements (foot center-of-mass) relative to body (pelvis center-of-mass) quantified stepping in body reference frame. Walking performance was quantified using step length asymmetry ratio, percent of paretic propulsion and paretic weight support. Findings-Participants with hemiparesis placed their paretic foot further anterior than posterior during walking compared to controls walking at matched slow speeds (p < .05). Participants also placed their paretic foot further lateral relative to pelvis than non-paretic (p < .05). Anterior-posterior asymmetry correlated with step length asymmetry and percent paretic propulsion but some persons revealed differing asymmetry patterns in the translating reference frame. Lateral foot placement asymmetry correlated with paretic weight support (r = .596; p < .001), whereas step widths showed no relation to paretic weight support.
Pelvic and shoulder movements in the frontal plane during treadmill walking in adults with stroke
Journal of Stroke and Cerebrovascular Diseases, 2004
Analysis of lateral displacement (LD) in the frontal plane during gait could provide information about asymmetric impairments and balance disorders for patients with stroke. The purpose of this study was to quantify the LD and lateral acceleration (LA) of the shoulders and pelvis of patients who were hemiparetic and walking at slow, natural, and fast speeds on a treadmill, and to compare the results with those for control subjects walking at similar speeds. A convenience sample of 10 patients with chronic stroke and 10 control subjects participated in this study. A videographic system was used to record the positions in the frontal plane of markers placed on the seventh cervical vertebra (shoulder level) and on the posterior iliac spines (pelvis level). Then, the LDs and LAs were calculated. The temporal parameters of the gait cycle were also determined using foot switches. The symmetry in the LAs and in the time spent in single stance was computed. Results showed that patients with stroke had larger LDs and LAs than the control group when walking at similar speeds. Results for patients with stroke also indicated that LAs were greater on the paretic side, whereas single stance percentages were greater on the nonparetic side. The data were almost symmetric for the control subjects. These findings indicate that the pelvis and shoulder of a patient with stroke have different rhythmic activity in the frontal plane compared with those of control subjects performing at similar speeds.
Journal of NeuroEngineering and Rehabilitation
Background: The effects of a stroke, such as hemiparesis, can severely hamper the ability to walk and to maintain balance during gait. Providing support to stroke survivors through a robotic exoskeleton, either to provide training or daily-life support, requires an understanding of the balance impairments that result from a stroke. Here, we investigate the differences between the paretic and non-paretic leg in making recovery steps to restore balance following a disturbance during walking. Methods: We perturbed 10 chronic-stage stroke survivors during walking using mediolateral perturbations of various amplitudes. Kinematic data as well as gluteus medius muscle activity levels during the first recovery step were recorded and analyzed. Results: The results show that this group of subjects is able to modulate foot placement in response to the perturbations regardless of the leg being paretic or not. Modulation in gluteus medius activity with the various perturbations is in line with this observation. In general, the foot of the paretic leg was laterally placed further away from the center of mass than that of the non-paretic leg, while subjects spent more time standing on the non-paretic leg. Conclusions: The findings suggest that, though stroke-related gait characteristics are present, the modulation with the various perturbations remains unaffected. This might be because all subjects were only mildly impaired, or because these stepping responses partly occur through involuntary pathways which remain unaffected by the complications after the stroke.