Comparison of the COM-FCP inclination angle and other mediolateral stability indicators for turning

Xu, Rui; Wang, Xin; Yang, Jiajia; He, Feng; Zhao, Xin; Qi, Hongzhi; Zhou, Peng; Dong, Ming

doi:10.1186/s12938-017-0325-z

Cited by 8 publications

(7 citation statements)

References 34 publications

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“…Originally the IA method used in this paper was developed as a clinical tool to alleviate the burden of requiring pathologic and elderly subjects to consistently strike the force plate to allow for CoP calculation (Chen and Chou, 2010). Our level surface calculated IAs closely agreed with three (AP HS, ML HS and ML TO) of the four IAs reported originally by Chen and Chou (Chen and Chou, 2010) and with the ML IAs reported by Xu, Wang (Xu, 2017). The difference in the AP TO IAs may be associated with the difference in age of the subjects reported by Chen and Chou (2010) as the average age of the subjects was 77 years compared to 19 years in the current study.…”

Section: Discussionsupporting

confidence: 71%

Inclination angles during cross-slope roof walking

et al. 2020

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Residential roofers have the highest rate of falls in the construction sector with injuries and fatalities costing billions of dollars annually. The sloped roof surface is the most predominant component within the residential roof work environment. Postural stability on a sloped work environment is not well studied. Calculating inclination angles (IAs) using the lateral ankle marker could be a quality measure to determine how cross-slope roof walking will influence stability.Will cross-slope roof-walking effect anterior-posterior (AP) and medial-lateral (ML) IAs in adult males?Eleven adult males participated in two testing sessions-level and cross-slope roof gait session on a 6/12 pitched roof segment. Changes in AP and ML IAs between conditions were compared at: heel strike (HS) and toe off (TO). Legs were analyzed separately due to the cross-slope walking. The left foot was 'higher' on the sloped roof and the right was 'lower.' Significant increases (p ≤ 0.006) in IAs were observed due to the sloped roof in all conditions except the AP 'lower' leg (p = 0.136).Increases in IA suggest a decrease in postural stability as the body will result in greater sway compared to a natural posture. Increases in AP IAs may cause slipping in the anterior or posterior direction as the normal force will decrease during HS and TO. In the ML direction, fall risk is increased and more stress is placed on the hip abductors in order to reduce falling. Thus traversing a sloped roof surface reduces stability of healthy workers and escalates injury/fall risk factors.

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Section: Discussionsupporting

confidence: 71%

Inclination angles during cross-slope roof walking

et al. 2020

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“…Walking along curved trajectories requires seamless interlimb coordination, adapted foot placement and fine control of medio-lateral body inclination [ 4 , 9 , 11 , 83 , 84 ]. Here, curved walking significantly decreased walking speed, stride-length and cadence both in HS and in patients with PD.…”

Section: Discussionmentioning

confidence: 99%

“…Curved walking has been studied in terms of muscle activation [ 2 , 3 ], kinematics [ 4 , 3 ] and kinetics [ 3 , 5 ]. These studies have shown modifications in muscle activation, walking speed or kinematics during curvilinear trajectories [ 6 , 7 , 8 , 9 ]. Seemingly, the nervous system orchestrates both straight-ahead and curved walking by modifying the same basic coordination pattern [ 4 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Abnormal gait pattern emerges during curved trajectories in high-functioning Parkinsonian patients walking in line at normal speed

et al. 2018

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BackgroundSeveral patients with Parkinson´s disease (PD) can walk normally along straight trajectories, and impairment in their stride length and cadence may not be easily discernible. Do obvious abnormalities occur in these high-functioning patients when more challenging trajectories are travelled, such as circular paths, which normally implicate a graded modulation in the duration of the interlimb gait cycle phases?MethodsWe compared a cohort of well-treated mildly to moderately affected PD patients to a group of age-matched healthy subjects (HS), by deliberately including HS spontaneously walking at the same speed of the patients with PD. All participants performed, in random order: linear and circular walking (clockwise and counter-clockwise) at self-selected speed. By means of pressure-sensitive insoles, we recorded walking speed, cadence, duration of single support, double support, swing phase, and stride time. Stride length-cadence relationships were built for linear and curved walking. Stride-to-stride variability of temporal gait parameters was also estimated.ResultsWalking speed, cadence or stride length were not different between PD and HS during linear walking. Speed, cadence and stride length diminished during curved walking in both groups, stride length more in PD than HS. In PD compared to HS, the stride length-cadence relationship was altered during curved walking. Duration of the double-support phase was also increased during curved walking, as was variability of the single support, swing phase and double support phase.ConclusionThe spatio-temporal gait pattern and variability are significantly modified in well-treated, high-functioning patients with PD walking along circular trajectories, even when they exhibit no changes in speed in straight-line walking. The increased variability of the gait phases during curved walking is an identifying characteristic of PD. We discuss our findings in term of interplay between control of balance and of locomotor progression: the former is challenged by curved trajectories even in high-functioning patients, while the latter may not be critically affected.

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“…In order to exploit gravity, the center of foot pressure during heel strike and toe off is being slightly displaced with respect to its position under linear walking. This creates a mediolateral torque that produces and controls trunk roll tilt and progression along the circular trajectory (6, 33–35), and generates the proper centripetal force to avoid going off on the tangent (4, 5, 27). Appropriate braking of the body fall toward the interior of the trajectory is exerted by the feet at foot-off (6, 36), such as to counterbalance the reaction forces produced at heel strike (37).…”

Section: Steering the Body Along Curved Pathsmentioning

confidence: 99%

Walking Along Curved Trajectories. Changes With Age and Parkinson's Disease. Hints to Rehabilitation

2019

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In this review, we briefly recall the fundamental processes allowing us to change locomotion trajectory and keep walking along a curved path and provide a review of contemporary literature on turning in older adults and people with Parkinson's Disease (PD). The first part briefly summarizes the way the body exploits the physical laws to produce a curved walking trajectory. Then, the changes in muscle and brain activation underpinning this task, and the promoting role of proprioception, are briefly considered. Another section is devoted to the gait changes occurring in curved walking and steering with aging. Further, freezing during turning and rehabilitation of curved walking in patients with PD is mentioned in the last part. Obviously, as the research on body steering while walking or turning has boomed in the last 10 years, the relevant critical issues have been tackled and ways to improve this locomotor task proposed. Rationale and evidences for successful training procedures are available, to potentially reduce the risk of falling in both older adults and patients with PD. A better understanding of the pathophysiology of steering, of the subtle but vital interaction between posture, balance, and progression along non-linear trajectories, and of the residual motor learning capacities in these cohorts may provide solid bases for new rehabilitative approaches.

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Comparison of the COM-FCP inclination angle and other mediolateral stability indicators for turning

Cited by 8 publications

References 34 publications

Inclination angles during cross-slope roof walking

Inclination angles during cross-slope roof walking

Abnormal gait pattern emerges during curved trajectories in high-functioning Parkinsonian patients walking in line at normal speed

Walking Along Curved Trajectories. Changes With Age and Parkinson's Disease. Hints to Rehabilitation

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