Muscle fascia and force transmission

Purslow, Peter P.

doi:10.1016/j.jbmt.2010.01.005

Cited by 176 publications

(123 citation statements)

References 47 publications

(64 reference statements)

Supporting

Mentioning

117

Contrasting

Unclassified

Order By: Relevance

“…Although Morrow et al may have less reliable strain estimates since they did not use image analysis for strain estimation, this should mean they would underestimate stress. It is more likely that their higher stiffness values result mainly from the use of aged tissue and possibly also from differences in the amount of perimysium in the skeletal muscle, which can vary between 0.4% -4.8% of dry weight (Purslow, 2010, KJAER, 2004, Purslow, 1999. The epimysium would also influence the measured stiffness, but it appears from the Morrow paper that epimysium was not present.…”

Section: Interpretation Of Resultsmentioning

confidence: 99%

“…The perimysium collagen fibres are arranged in a cross-ply manner, with an angle of 55 0 to the muscle fibre direction muscle is un-stretched, and have been observed to change to 20 0 with respect to the main muscle fibre direction when stretched, at which stage it is thought the thicker stronger perimysium collagen fibres bear almost all the load (Passerieux et al, 2007, Scheip et al, 2006, Monti et al, 1999, Trotter and Purslow, 1992, Street, 1983. However, although a somewhat regular fibre angle has been observed for the perimysium, the endomysium surrounding individual muscle fibres has a more random fibre orientation (Purslow, 2010). Accordingly, it is perhaps not surprising that no obvious torsional mode was observed for any of the different muscle fibre orientations in this study.…”

Section: Testing Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The anisotropic mechanical behaviour of passive skeletal muscle tissue subjected to large tensile strain

Takaza

Moerman

Gindre

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

129

View full text Add to dashboard Cite

The anisotropic mechanical behaviour of passive skeletal muscle tissue subjected to large tensile strain, Journal of the Mechanical Behavior of Biomedical Materials, http://dx.doi.org/10. 1016/j.jmbbm.2012.09.001 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe passive mechanical properties of muscle tissue are important for many biomechanics applications. However, significant gaps remain in our understanding of the three-dimensional tensile response of passive skeletal muscle tissue to applied loading. In particular, the nature of the anisotropy remains unclear and the response to loading at intermediate fibre directions and the Poisson's ratios in tension have not been reported. Accordingly, tensile tests were performed along and perpendicular to the muscle fibre direction as well as at 30, 45 and 60 degrees to the muscle fibre direction in samples of Longissimus dorsi muscle taken from freshly slaughtered pigs. Strain was measured using an optical non-contact method. The results show the transverse or cross fibre (TT') direction is broadly linear and is the stiffest (77kPa stress at a stretch of 1.1), but that failure occurs at low stretches (approximately λ = 1.15). In contrast the longitudinal or fibre direction (L) is nonlinear and much less stiff (10kPa stress at a stretch of 1.1) but failure occurs at higher stretches (approximately λ = 1.65). An almost sinusoidal variation in stress response was observed at intermediate angles. The following Poisson's ratios were measured: Ѵ LT = Ѵ LT' = 0.47, Ѵ TT' = 0.28 and Ѵ TL = 0.74. These observations have not been previously reported and they contribute significantly to our understanding of the three dimensional deformation response of skeletal muscle tissue.

show abstract

Section: Interpretation Of Resultsmentioning

confidence: 99%

Section: Testing Methodsmentioning

confidence: 99%

The anisotropic mechanical behaviour of passive skeletal muscle tissue subjected to large tensile strain

Takaza

Moerman

Gindre

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

129

View full text Add to dashboard Cite

show abstract

“…Structural modifications in the connective tissue of EDS-HT patients are thought to be responsible for this increased muscle-tendon compliance (33). In addition to myotendinous force transmission, up to 40% of the muscle force generated within a muscle can be transmitted from muscle fibers onto the intra-, inter-, and extramuscular connective tissue to the skeleton (myofascial force transmission) (34). Altered compliance of these myofascial pathways might decrease the force transmitted, resulting in muscle weakness.…”

Section: Rombaut Et Almentioning

confidence: 99%

Muscle mass, muscle strength, functional performance, and physical impairment in women with the hypermobility type of Ehlers‐Danlos syndrome

Rombaut

Malfait

Wandele

et al. 2012

Arthritis Care & Research

View full text Add to dashboard Cite

Objective. To investigate lower extremity muscle mass, muscle strength, functional performance, and physical impairment in women with the Ehlers-Danlos syndrome hypermobility type (EDS-HT). Methods. Forty-three women with EDS-HT and 43 sex-and age-matched healthy control subjects participated. Muscle mass was determined by dual x-ray absorptiometry. Muscle strength and muscle strength endurance were measured with isokinetic dynamometry at angular velocities of 60, 180, and 240°/second. Static muscle endurance during posture maintenance was also assessed. Pain and fatigue were simultaneously evaluated by visual analog scale and the Borg scale, respectively. In addition, the chair rise test for assessment of functional performance and the Arthritis Impact Measurement Scales (AIMS) for physical impairment evaluation were used. Results. Compared to control subjects, EDS-HT patients showed substantial lower extremity muscle weakness, reflected by significantly reduced knee extensor and flexor muscle strength and endurance parameters, with differences ranging from ؊30% to ؊49%; reduced static muscle endurance time; and diminished functional performance. Lower extremity muscle mass was similar in both groups and unlikely to affect the muscle strength results. By contrast, pain and fatigue were omnipresent and increased remarkably due to the tests. Furthermore, the EDS-HT group was physically impaired, especially in the AIMS domain walking and bending. Conclusion. This study demonstrates severely reduced quantitative muscle function and impairment in physical function in patients with EDS-HT compared to age-and sex-matched controls. The muscle weakness may be due to muscle dysfunction rather than reduced muscle mass. Whether muscle strength and endurance can be improved by appropriate exercise programs needs evaluation in further studies.

show abstract

“…The fascicles themselves are subdivided into muscle fibres by the thinner and more randomly oriented collagen fibres of the endomysium layer, which is a continuous planar network that surrounds the muscle fibres (Purslow, 2002, Purslow, 2008, Purslow and Trotter, 1994. Elegant work performed by Purslow and co-workers (Purslow and Trotter, 1994, Purslow, 2005, Purslow, 2008, Lewis and Purslow, 1989, Purslow, 1985, Purslow, 1999, Purslow, 2002, Purslow, 2010, Trotter and Purslow, 1992 and others has allowed the connective tissue structure to be observed with the muscle fibres removed, see Figure 2, and the collagen fibres in the connective tissue have been shown to reorient with changes in muscle length (Purslow, 2002, Purslow, 2010 and be efficient in myofascial force transmission (Purslow, 2008) and the perimysium has been suggested as a mechanism to facilitate intramuscular sliding (Purslow, 2010). However, more analysis of the internal mechanisms resisting externally applied loading is needed to explain the experimentally observed stress strain relationships in passive skeletal muscle presented in (Calvo et al, 2010, Morrow et al, 2010, Nie et al, 2011, Yamada, 1970, Martins et al, 1998, Van Loocke et al, 2006, Grieve and Armstrong, 1988, Vannah and Childress, 1993, Zheng et al, 1999.…”

Section: Introductionmentioning

confidence: 99%

A structural model of passive skeletal muscle shows two reinforcement processes in resisting deformation

Gindre

Takaza

Moerman

et al. 2013

Journal of the Mechanical Behavior of Biomedical Materials

View full text Add to dashboard Cite

Passive skeletal muscle derives its structural response from the combination of the titin filaments in the muscle fibres, the collagen fibres in the connective tissue and incompressibility due to the high fluid content. Experiments have shown that skeletal muscle tissue presents a highly asymmetrical three-dimensional behaviour when passively loaded in tension or compression, but structural models predicting this are not available. The objective of this paper is to develop a mathematical model to study the internal mechanisms which resist externally applied deformation in skeletal muscle bulk. One cylindrical muscle fibre surrounded by connective tissue was considered. The collagenous fibres of the endomysium and perimysium were grouped and modelled as tension-only oriented wavy helices wrapped around the muscle fibre. The titin filaments are represented as non-linear tensiononly springs. The model calculates the force developed by the titin molecules and the collagen network when the muscle fibre undergoes an isochoric along-fibre stretch. The model was evaluated using a range of literature based input parameters and compared to the experimental fibre-direction stress-stretch data available. Results show the fibre direction non-linearity and tension/compression asymmetry are partially captured by this structural model. The titin filament load dominates at low tensile stretches, but for higher stretches the collagen network was responsible for most of the stiffness. The oblique and initially wavy collagen fibres account for the non-linear tensile response since, as the collagen fibres are being recruited, they straighten and re-orient. The main contribution of the model is that it shows that the overall compression/tension response is strongly influenced by a pressure term induced by the radial component of collagen fibre stretch acting on the incompressible muscle fibre. Thus for along-fibre tension or compression the model predicts that the collagen network contributes to overall muscle stiffness through two different mechanisms: 1) a longitudinal force directly opposing tension and 2) a pressure force on the muscle fibres resulting in an indirect longitudinal load. Although the model presented considers only a single muscle fibre and evaluation is limited to along-fibre loading, this is the first model to propose these two internal mechanisms for resisting externally applied deformation of skeletal muscle tissue.2

show abstract

Muscle fascia and force transmission

Cited by 176 publications

References 47 publications

The anisotropic mechanical behaviour of passive skeletal muscle tissue subjected to large tensile strain

The anisotropic mechanical behaviour of passive skeletal muscle tissue subjected to large tensile strain

Muscle mass, muscle strength, functional performance, and physical impairment in women with the hypermobility type of Ehlers‐Danlos syndrome

A structural model of passive skeletal muscle shows two reinforcement processes in resisting deformation

Contact Info

Product

Resources

About