Quantifying lower limb inter-joint coordination and coordination variability after four-month wearing arch support foot orthoses in children with flexible flat feet

Jafarnezhadgero, Amir Ali; Mousavi, Seyed Hamed; Madadi-Shad, Morteza; Hijmans, Juha M.

doi:10.1016/j.humov.2020.102593

Cited by 10 publications

(11 citation statements)

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“…In addition, the data revealed a greater range of ankle movement than MPJ after supporting the arch. A study by Jafarnezhadgero et al [ 28 ] found that after four months of AS manipulation intervention, the patients with flexible flatfoot displayed a lower-extremity inter-joint coordination mode indicating more inversion motion in the ankle during mid-stance than before the intervention. However, they explored the effects of wearing foot orthoses for a long time while using only the most conventional gait tests; hence it is not appropriate to compare previous findings with the results of our experiment.…”

Section: Discussionmentioning

confidence: 99%

“…Selected segment couplings included ankle sagittal plane vs. MPJ sagittal plane, ankle frontal plane vs. MPJ frontal plane, and ankle transverse plane vs. MPJ transverse plane. Figure 3 illustrates the classification of coordination patterns from the CA in sagittal, frontal, and transverse planes [ 28 ].…”

Section: Methodsmentioning

confidence: 99%

“…Coordination patterns can assess the timing and degree of relative movement of inter-segment of the human body, allowing researchers to understand further the collaborative mechanism of the motor system [ 28 ]. Meanwhile, coordination variability (CV) can play an essential role in controlling the motion strategies by quantifying the coordination patterns’ level of fluctuation and improving the adaptive capacity to movement disturbances and task constraints [ 28 , 29 , 30 ]. Coordination and CV during moving have also been associated with biological systems’ health status [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…Coordination and CV during moving have also been associated with biological systems’ health status [ 31 ]. Previous research [ 28 ] demonstrated that the 4-month usage of arch support (AS) orthoses could significantly improve joint coordination between ankle, knee, and hip, in patients with flatfoot during walking. However, the coordination pattern between the metatarsophalangeal joint (MPJ) and ankle joint, which is the closest anatomically to the foot arch, has been ignored.…”

Section: Introductionmentioning

confidence: 99%

“…To the best of our current knowledge, although some researchers [ 28 ] have attempted to analyze the long-term impact of foot orthoses on the inter-joint coordination during steady-state gait, few studies have verified the biomechanical mechanism of acute arch-support (AS) manipulation intervention during gait sub-tasks represented by gait termination. The acute effect from arch manipulation can reflect the essential characteristic in foot biomechanics and alleviate the potential confounding effects caused by long-term intervention, such as weight changes [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Arch-Support Induced Changes in Foot-Ankle Coordination in Young Males with Flatfoot during Unplanned Gait Termination

Cen

Gao

Yang

et al. 2021

JCM

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Objective: The efficacy of arch orthoses in posture adjustment and joint coordination improvement during steady-state gait is well documented; however, the biomechanical changes of gait sub-tasks caused by arch support (AS), especially during gait termination, are poorly understood. Hence, this study aimed to investigate how the acute arch-supporting intervention affects foot–ankle coordination and coordination variability (CV) in individuals with flatfoot during unplanned gait termination (UGT). Methods: Twenty-five male patients with flatfoot were selected as subjects participated in this AS manipulation study. A motion capture system was used for the collection of the metatarsophalangeal joint (MPJ) and ankle kinematics during UGT. MPJ-Ankle coordination and CV were quantified using an optimized vector coding technique during the three sub-phases of UGT. A paired-sample t-test from the one-dimensional statistical parametric mapping of one-dimensional was applied to examine the data significance. Results: Significant differences for the joint kinematics between non-arch-support (NAS) and AS were exhibited only in the MPJ transverse plane during the middle and later periods of UGT (p = 0.04–0.026). Frontal plane MPJ-ankle coordination under AS during stimulus delay significantly decreased from 177.16 ± 27.41° to 157.75 ± 32.54° compared with under NAS (p = 0.026); however, the coordination pattern had not changed. Moreover, no significant difference was found in the coupling angle variability between NAS and AS in three planes during sub-phases of UGT (all p > 0.5). Conclusions: The detailed intrinsic characteristic of AS induced acute changes in lower extremity segment coordination in patients with mild flatfoot has been recorded. This dataset on foot-ankle coordination characteristics during UGT is essential for explaining foot function and injury prediction concerning AS manipulation. Further studies are expected to reflect lower limb inter-joint coordination during gait termination through the long-term effects of AS orthoses.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%