The compliance of contracting skeletal muscle

Bressler, Bernard; Clinch, N. F.

doi:10.1113/jphysiol.1974.sp010493

Cited by 81 publications

(52 citation statements)

References 20 publications

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“…As an alternhtive a series elasticity can be thought of which is in series with both the contractile element and the parallel passive elasticity: a Voigt configuration. Both configurations have been proposed for smooth muscle (Ford et al, 1977;Bressler & Clinch, 1974). The additivity of active and passive force has been demonstrated for this type of tissue using a different type of measurement (Griffiths et al, 1979).…”

Section: Discussionmentioning

confidence: 99%

The length dependence of the series elasticity of pig bladder smooth muscle

Mastrigt

1988

J Muscle Res Cell Motil

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SummaryStrips of urinary bladder smooth muscle were sul~jected to a series of quick release measurements. Each measurement consisted of several releases and resets to the original length, made during one contraction. The complete length-force characteristic of series elasticity was quantified by estimating H, the amplitude of quick release necessary to reduce the active force to exactly zero, and Db, a measure for the deviation of the characteristic from a straight line. By measuring a series of contractions at increasing stretched strip lengths, the length dependence of these parameters was studied. It was found that H depends linearly on stretched strip length. On average Hflength amounted to 0.04. Db decreased when strips were stretched, i.e. a straight line was more closely approximated. Both parameter dependencies support the concept of two separate elastic mechanisms, a linear true passive elasticity in series with a non-linear elasticity in the cross-bridges. For the latter, H amounts to 3.8% of the initial strip length.

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Section: Discussionmentioning

confidence: 99%

The length dependence of the series elasticity of pig bladder smooth muscle

Mastrigt

1988

J Muscle Res Cell Motil

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“…This was about 1-5 % of muscle length in the experiments of Jewell & Wilkie (1958) and of Bressler & Clinch (1974), and 1-0-1-3 % estimated from the curves in our Fig. 30 (see page 492), the slightly higher value in the whole-muscle experiments being very likely due to the contribution from tendon * There is a discrepancy in the labelling of the curves in this Figure L. E. FORD, A. F. HUXLEY AND R. M. SIMMONS compliance, etc., which in our experiments was eliminated by the spotfollower.…”

Section: Discussionmentioning

confidence: 99%

“…In experiments by Hill (1950), Jewell & Wilkie (1958 and Bressler & Clinch (1974), moderately rapid shortening ramps were applied to frog or toad muscles, and the tension at each instant was plotted against the simultaneous change of length. None of these authors described the inflexion that is to be expected (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…30B) instead of against time. The time course of onset of the ramp was made similar to that of Bressler & Clinch (1974, fig. 2).…”

Section: Tension Transients In Active Muscle 487mentioning

confidence: 99%

“…For comparison with published records such as those of Bressler & Clinch (1974), we have also plotted a family of computed ramp responses against the instantaneous length change (Fig. 30B) instead of against time.…”

Section: Tension Transients In Active Muscle 487mentioning

confidence: 99%

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Tension responses to sudden length change in stimulated frog muscle fibres near slack length

Ford

Huxley

Simmons

1977

The Journal of Physiology

831

113

902

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SUMMARY1. Apparatus for applying a step change of length to an isolated muscle fibre is described. The step was complete in about 0.2 ms.2. Effects of tendon compliance were eliminated by using a spotfollower device and by gripping the tendons with metal clips close to the fibre ends.3. The natural frequency of the force transducer was above 10 kHz. 4. Steps of various amplitudes and in either direction were applied to isolated muscle fibres about 6 mm long from the anterior tibial muscle of Rana temporaria during tetanic stimulation. Initial sarcomere length was 2*0-2-2 #im, and temperature was 0-3 'C.5. The tension response to a step could be divided into four phases. The initial response was an apparently elastic change during the step itself (phase 1). After the step was completed there was a rapid partial recovery towards the original tension (phase 2, lasting 2-5 ins), followed by a slowing or reversal of recovery (phase 3, 10-50 ms), and finally a much slower return to the original tension (phase 4). Most of this paper is concerned with phases 1 and 2.6. The initial tension change (phase 1) occurred synchronously with the applied length change, indicating that the fibres possess a compliance which is almost linear and almost undamped. Its L. E. FORD, A. F. HUXLEY AND R. M. SIMMONS when a very large step was applied. These observations suggest that the structures responsible for the stiffness of the fibre remain rigid when they are not under tension.9. During the few milliseconds after the step (phase 2) the tension recovered part of the way toward the level which existed before the step. In shortening steps the time course of this recovery was adequately fitted by the sum of four exponential terms, and was similar in steps of different amplitude but with a time scale shorter the larger the step. In stretches the slow components were relatively larger than in releases.10. The tension level, T2, approached during phase 2 depended only on the total amplitude of the step and not on the time course of the length change, provided it was complete in 1-2 ms. The extreme tension reached during a step could thus vary widely without detectable change in T2.11. With stretches and releases of up to about 3 nm per half-sarcomere this early recovery was almost complete, so that the curve of T2 against step amplitude was nearly horizontal. With larger releases the line curved downwards, reaching zero in a release of about 14 nm per half-sarcomere.12. When the temperature was raised both the developed tension and the stiffness increased, but the relative increase was greater for tension than for stiffness. The amount of instantaneous shortening needed to bring tension to zero was therefore also increased.13. A set of empirical equations is given which describe adequately the first few milliseconds of the tension change in response to any imposed time course of shortening.14. The rapid elasticity and early tension recovery resemble the response of a combination of two elastic components and one viscous component.

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Mechanical properties of gastrointestinal smooth muscle

Meiss

1989

Comprehensive Physiology

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The compliance of contracting skeletal muscle

Cited by 81 publications

References 20 publications

The length dependence of the series elasticity of pig bladder smooth muscle

The length dependence of the series elasticity of pig bladder smooth muscle

Tension responses to sudden length change in stimulated frog muscle fibres near slack length

Mechanical properties of gastrointestinal smooth muscle

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