The passive mechanical properties of muscle

Herbert, Robert D.; Gandevia, Simon C.

doi:10.1152/japplphysiol.00966.2018

Cited by 24 publications

(19 citation statements)

References 20 publications

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“…While the major role of muscle is to generate force and movement from muscle fibers, connective tissue is critical to transmit this force as well as to bear active and passive loads throughout the muscle (Purslow, 1989;Gillies and Lieber, 2011). This passive load bearing property is poorly understood (Herbert and Gandevia, 2019) partly because the vast majority of previous research focused on muscle active force production (Lieber and Ward, 2011;Herzog, 2017;Lieber et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Intramuscular Anatomy Drives Collagen Content Variation Within and Between Muscles

2020

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Section: Introductionmentioning

confidence: 99%

Intramuscular Anatomy Drives Collagen Content Variation Within and Between Muscles

2020

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“…Moreover, the underlying mechanisms that contribute to the nonlinear behavior of resistance to passive movement after stroke need further investigation. 50…”

Section: Discussionmentioning

confidence: 99%

Time Course of Wrist Hyper-Resistance in Relation to Upper Limb Motor Recovery Early Post Stroke

Andringa

Meskers

Port

et al. 2020

Neurorehabil Neural Repair

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Background. Patients with an upper limb motor impairment are likely to develop wrist hyper-resistance during the first months post stroke. The time course of wrist hyper-resistance in terms of neural and biomechanical components, and their interaction with motor recovery, is poorly understood. Objective. To investigate the time course of neural and biomechanical components of wrist hyper-resistance in relation to upper limb motor recovery in the first 6 months post stroke. Methods. Neural (NC), biomechanical elastic (EC), and viscous (VC) components of wrist hyper-resistance (NeuroFlexor device), and upper limb motor recovery (Fugl-Meyer upper extremity scale [FM-UE]), were assessed in 17 patients within 3 weeks and at 5, 12, and 26 weeks post stroke. Patients were stratified according to the presence of voluntary finger extension (VFE) at baseline. Time course of wrist hyper-resistance components and assumed interaction effects were analyzed using linear mixed models. Results. On average, patients without VFE at baseline (n = 8) showed a significant increase in NC, EC, and VC, and an increase in FM-UE from 13 to 26 points within the first 6 months post stroke. A significant increase in NC within 5 weeks preceded a significant increase in EC between weeks 12 and 26. Patients with VFE at baseline (n = 9) showed, on average, no significant increase in components from baseline to 6 months whereas FM-UE scores improved from 38 to 60 points. Conclusion. Our findings suggest that the development of neural and biomechanical wrist hyper-resistance components in patients with severe baseline motor deficits is determined by lack of spontaneous neurobiological recovery early post stroke.

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“…However, previous studies have not described predictive models of the anisotropic viscoelastic responses of relaxed muscles under physiological conditions. The changes in muscle tissues that determine spinal stiffness are not fully understood, requiring further research [ 15 , 16 ]. One of the characteristics of muscle tissue that could modify its mechanical properties is thixotropy [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Spinal Movements Associated with Physical Evaluation on Muscle Mechanical Properties of the Lumbar Paraspinal in Subjects with Acute Low Back Pain

et al. 2022

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This research aimed to identify changes in muscle mechanical properties (MMPs) when a standardized sequence of movements is performed and to determine the influence of acute low back pain (LBP) and age on the MMPs. Socio-demographic, clinical variables and MMPs were collected in 33 patients with LBP and 33 healthy controls. A 2 × 2 × 2 (group × age × time) analysis of variance (ANOVA) mixed model was used to determine the effect of the study factors on the different MMPs. There were no significant triple interactions. After the movements, tone and stiffness increased 0.37 Hz and 22.75 N/m, respectively, in subjects <35 years, independent of their clinical status. Relaxation showed differences by age in healthy subjects and creep in LBP subjects. Furthermore, elasticity was higher in <35 years (p < 0.001) without the influence of any other factor. In conclusion, sequenced movements can modify tone and stiffness as a function of age, while age-associated changes in viscoelastic characteristics depends on pain but not on movements. The MMPs should be assessed, not only at the beginning of the physical examination at rest, but also along the patient’s follow-up, depending on their pain and age, in a clinical setting.

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The passive mechanical properties of muscle

Cited by 24 publications

References 20 publications

Intramuscular Anatomy Drives Collagen Content Variation Within and Between Muscles

Intramuscular Anatomy Drives Collagen Content Variation Within and Between Muscles

Time Course of Wrist Hyper-Resistance in Relation to Upper Limb Motor Recovery Early Post Stroke

Influence of Spinal Movements Associated with Physical Evaluation on Muscle Mechanical Properties of the Lumbar Paraspinal in Subjects with Acute Low Back Pain

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