The significance of closed kinematic chains to biological movement and dynamic stability

Levin, S. M.; Solórzano, Susan Lowell de; Scarr, Graham

doi:10.1016/j.jbmt.2017.03.012

Cited by 27 publications

(18 citation statements)

References 51 publications

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“…We believe that these analyses will allow a new perspective on PFJ arthrokinematics and could broaden the knowledge related to joint tribology and especially the behavior of normal and abnormal synovial joints during loaded and unloaded motion. It is an essential issue, due to the recently observed significant interest in comparing potential benefits and limitations of CKC and OKC exercises as they relate to lower extremity rehabilitation [22–25].…”

Section: Introductionmentioning

confidence: 99%

Analysis of patellofemoral arthrokinematic motion quality in open and closed kinetic chains using vibroarthrography

Bączkowicz

Kręcisz

Borysiuk

2019

BMC Musculoskelet Disord

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BackgroundKnee movements performed in open (OKC) and closed (CKC) kinetic chains generate various patterns of muscle activities and especially distinct contact stresses in the patellofemoral joint (PFJ). In contrast to these features, the arthrokinematic motion quality (AMQ) of the PFJ has not been compared between mentioned conditions. In this study we performed vibroarthrographic analysis of AMQ in movements performed in OKC and CKC, in healthy subjects and individuals with chondromalacia patellae, to assess which of the test conditions is more efficient in differentiation between healthy and deteriorated joints. Moreover, our analysis will broaden the knowledge related to behavior of normal and pathological synovial joints during motion with and without weight bearing. It is an essential issue, due to the recently observed significant interest in comparing potential benefits and limitations of CKC and OKC exercises as they relate to lower extremity rehabilitation.Methods100 subjects (62 healthy controls and 38 subjects with PFJ chondromalacia) were enrolled. During repeated knee flexion/extension motions performed in OKC (in a sitting position) and CKC (sit-to-stand movements), the vibroarthrographic signals were collected using an accelerometer and described by variability (VMS), amplitude (R4), and spectral power in 50–250 Hz (P1) and 250–450 Hz (P2) bands.ResultsSignificant differences in VMS [V], R4 [V], P1 [V2/Hz] and P2 [V2/Hz] between OKC and CKC were found (0.0001, 0.969. 0.800 0.041 vs 0.013, 3.973, 6.790, 0.768, respectively, P < 0.001). Moreover, in both analyzed load-related conditions the subjects with chondromalacia were characterized by significantly higher values of all parameters, when compared to controls (P < 0.001), with effect size values over 0.6.ConclusionsWe showed that motion of the physiological, unloaded PFJ articular surfaces in OKC is nearly vibrationless, which corresponds with optimal AMQ of PFJ, while loaded movements in CKC are characterized by a higher vibroacoustic emission level. Moreover, chondral lesions should be considered as an increased friction-related, aggravating factor of AMQ, which is critical in CKC movements under load. Nonetheless, OKC and CKC conditions are characterized by large effect sizes, and provide an efficient test frame for differentiating physiological knees and joints with chondral lesions.

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Section: Introductionmentioning

confidence: 99%

Analysis of patellofemoral arthrokinematic motion quality in open and closed kinetic chains using vibroarthrography

Bączkowicz

Kręcisz

Borysiuk

2019

BMC Musculoskelet Disord

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“…We could examine the global continuity between the cellular cytoskeleton, extracellular matrix and fascia etc. (Ingber et al 2014), and explain why bone is considered part of the latter (Bordoni and Lagana, 2019;Levin, 2018a,b); describe the geometry of motion, or rather, the closed kinematic chain system that pervades the entire body at every size-scale and enables forces, power and information to be transferred from one region to another in a controllable way (Levin et al 2017). We could also offer multiple anatomical examples for how biotensegrity provides a more complete explanation of normal and 'abnormal' joint function than is currently available.…”

Section: The Conundrummentioning

confidence: 99%

Biotensegrity: What is the big deal?

Scarr

2020

Journal of Bodywork and Movement Therapies

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“…Furthermore, as it was previously postulated, the subsequent VAG analyses should consider the influence of the load level on knee arthrokinematics during functional closed kinetic chain activities [19]. In comparison to analyses of open chain activities, the closed kinetic chain provides a better reproduction of the character of the PFJ in daily activities [23,29,30].…”

Section: Introductionmentioning

confidence: 99%

Vibroarthrographic analysis of patellofemoral joint arthrokinematics during squats with increasing external loads

Ołowiana

Selkow

Laudner

et al. 2020

BMC Sports Sci Med Rehabil

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Background: The patellofemoral joint (PFJ) provides extremely low kinetic friction, which results in optimal arthrokinematic motion quality. Previous research showed that these friction-reducing properties may be diminished due to the increase in articular contact forces. However, this phenomenon has not been analyzed in vivo during functional daily-living activities. The aim of this study was the vibroarthrographic assessment of changes in PFJ arthrokinematics during squats with variated loads. Methods: 114 knees from 57 asymptomatic subjects (23 females and 34 males) whose ages ranged from 19 to 26 years were enrolled in this study. Participants were asked to perform 3 trials: 4 repetitions of bodyweight squats (L0), 4 repetitions of 10 kg barbell back loaded squats (L10), 4 repetitions of 20 kg barbell back loaded squats (L20). During the unloaded and loaded (L10, L20) squats, vibroarthrographic signals were collected using an accelerometer placed on the patella and were described by the following parameters: variation of mean square (VMS), mean range (R4), and power spectral density for frequency of 50-250 Hz (P1) and 250-450 Hz (P2). Results: Obtained results showed that the lowest values were noted in the unloaded condition and that the increased applied loads had a significant concomitant increase in all the aforementioned parameters bilaterally (p < 0.05). Conclusion: This phenomenon indicates that the application of increasing knee loads during squats corresponds to higher intensity of vibroacoustic emission, which might be related to higher contact stress and kinetic friction as well as diminished arthrokinematic motion quality.

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The significance of closed kinematic chains to biological movement and dynamic stability

Cited by 27 publications

References 51 publications

Analysis of patellofemoral arthrokinematic motion quality in open and closed kinetic chains using vibroarthrography

Analysis of patellofemoral arthrokinematic motion quality in open and closed kinetic chains using vibroarthrography

Biotensegrity: What is the big deal?

Vibroarthrographic analysis of patellofemoral joint arthrokinematics during squats with increasing external loads

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