Sensitivity of the shear wave speed-stress relationship to soft tissue material properties and fiber alignment

Blank, Jonathon; Thelen, Darryl G.; Allen, Mathew S.; Roth, Joshua D.

doi:10.1016/j.jmbbm.2021.104964

Cited by 12 publications

(8 citation statements)

References 49 publications

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“…The main assumption of shear-wave tensiometry is that the shear-wave propagation speed depends primarily on tendon axial stress under physiological loads ( Martin et al, 2018 ). Even if this assumption holds true, which might not be the case under very low or high physiological loads ( Blank et al, 2022 ; Sarvazyan et al, 2013 ), axial stress is influenced by both the force in the tendon and the tendon’s architecture (i.e. the width and thickness of the tendon).…”

Section: Discussionmentioning

confidence: 99%

Residual force enhancement is affected more by quadriceps muscle length than stretch amplitude

Bakenecker

Weingarten

Hahn

et al. 2022

eLife

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Little is known about how muscle length affects residual force enhancement (rFE) in humans. We therefore investigated rFE at short, long, and very long muscle lengths within the human quadriceps and patellar tendon (PT) using conventional dynamometry with motion capture (rFETQ) and a new, non-invasive shear-wave tensiometry technique (rFEWS). Eleven healthy male participants performed submaximal (50% max.) EMG-matched fixed-end reference and stretch-hold contractions across these muscle lengths while muscle fascicle length changes of the vastus lateralis (VL) were captured using B-mode ultrasound. We found significant rFETQ at long (7±5%) and very long (12±8%), but not short (2±5%) muscle lengths, whereas rFEWS was only significant at the very long (38±27%), but not short (8±12%) or long (6±10%) muscle lengths. We also found significant relationships between VL fascicle length and rFETQ (r=0.63, p=.001) and rFEWS (r=0.52, p=.017), but relationships were not significant between VL fascicle stretch amplitude and rFETQ (r=0.33, p=.126) or rFEWS (r=0.29, p=.201). PT shear-wave speed-angle relationships did not agree with estimated PT force-angle relationships, which indicates that estimating PT loads from shear-wave tensiometry might be inaccurate. We conclude that increasing muscle length rather than stretch amplitude contributes more to rFE during submaximal voluntary contractions of the human quadriceps.

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Section: Discussionmentioning

confidence: 99%

Residual force enhancement is affected more by quadriceps muscle length than stretch amplitude

Bakenecker

Weingarten

Hahn

et al. 2022

eLife

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“…Our numerical experiments showed that the uncertainty in travel time could be estimated from the strength of correlation ( Figure 5 ), a relationship that was used to describe the noise processes in the Kalman filter model. Further study is needed to investigate non-noise processes more fully, e.g., dispersion, that can contribute to decorrelation from in situ tensiometry measurements [ 22 , 23 ].…”

Section: Discussionmentioning

confidence: 99%

A Kalman Filter Approach for Estimating Tendon Wave Speed from Skin-Mounted Accelerometers

Schmitz

Thelen

Cone

2022

Sensors

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Shear wave tensiometry is a noninvasive approach for assessing in vivo tendon forces based on the speed of a propagating shear wave. Wave speed is measured by impulsively exciting a shear wave in a tendon and then assessing the wave travel time between skin-mounted accelerometers. Signal distortion with wave travel can cause errors in the estimated wave travel time. In this study, we investigated the use of a Kalman filter to fuse spatial and temporal accelerometer measurements of wave propagation. Spatial measurements consist of estimated wave travel times between accelerometers. Temporal measurements are the change in wave arrival at a fixed accelerometer between successive impulsive taps. The Kalman filter substantially improved the accuracy of estimated wave speeds when applied to simulated tensiometer data. The variability of estimated wave speed was reduced by ~55% in the presence of random sensor noise. It was found that increasing the number of accelerometers from two to three further reduced wave speed errors by 45%. The use of redundant accelerometers (>2) also improved the robustness of wave speed measures in the presence of uncertainty in accelerometer location. We conclude that the use of a Kalman filter and redundant accelerometers can enhance the fidelity of using shear wave tensiometers to track tendon wave speed and loading during movement.

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“…The main assumption of shear-wave tensiometry is that the shear-wave propagation speed depends primarily on tendon axial stress under physiological loads (Martin et al 2018). Even if this assumption holds true, which might not be the case under very low or high physiological loads (Sarvazyan et al 2013; Blank et al 2022), axial stress is influenced by both the force in the tendon and the tendon’s architecture (i.e. the width and thickness of the tendon).…”

Section: Discussionmentioning

confidence: 99%

“…It is made available under a preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in The copyright holder for this this version posted February 14, 2022. ; https://doi.org/10. 1101/2022…”

Section: Competing Interestsmentioning

confidence: 99%

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Residual force enhancement within the human quadriceps is greatest during submaximal stretch-hold contractions at a very long muscle length

Bakenecker

Weingarten

Hahn

et al. 2022

Preprint

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Little is known about how muscle length affects residual force enhancement (rFE) in humans. We therefore investigated rFE at short, long, and very long muscle lengths within the human quadriceps and patellar tendon (PT) using conventional dynamometry with motion capture (rFETQ) and a new, non-invasive shear-wave tensiometry technique (rFEWS). Eleven healthy male participants performed submaximal (50% max.) EMG-matched fixed-end reference and stretch-hold contractions across these muscle lengths while muscle fascicle length changes of the vastus lateralis (VL) were captured using B-mode ultrasound. We found significant rFETQ at long (7±5%) and very long (12±8%) but not short (2±5%) muscle lengths, whereas rFEWS was only significant at the very long (38±27%), but not short (8±12%) or long (6±10%) muscle lengths. We also found significant relationships between VL fascicle length and rFETQ (r=0.63, p=.001) and rFEWS (r=0.52, p=.017), but relationships were not significant between VL fascicle stretch amplitude and rFETQ (r=0.33, p=.126) or rFEWS (r=0.29, p=.201). PT shear-wave speed-angle relationships did not agree with estimated quadriceps muscle force-angle relationships, which indicates that estimating PT loads from shear-wave tensiometry might be inaccurate. We conclude that increasing muscle length rather than stretch amplitude contributes more to rFE during submaximal voluntary contractions of the human quadriceps.

show abstract

Sensitivity of the shear wave speed-stress relationship to soft tissue material properties and fiber alignment

Cited by 12 publications

References 49 publications

Residual force enhancement is affected more by quadriceps muscle length than stretch amplitude

Residual force enhancement is affected more by quadriceps muscle length than stretch amplitude

A Kalman Filter Approach for Estimating Tendon Wave Speed from Skin-Mounted Accelerometers

Residual force enhancement within the human quadriceps is greatest during submaximal stretch-hold contractions at a very long muscle length

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