2017
DOI: 10.1242/jeb.143545
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Abstract: The functional consequences of differential muscle activation and contractile behavior between mechanically coupled synergists are still poorly understood. Even though synergistic muscles exert similar mechanical effects at the joint they span, differences in the anatomy, morphology and neural drive may lead to non-uniform contractile conditions. This study aimed to investigate the patterns of activation and contractile behavior of triceps surae muscles, to understand how these contribute to the relative displ… Show more

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Cited by 12 publications
(9 citation statements)
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References 74 publications
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“…However, a different behavior was observed in the intact compartment and with a physiological pattern of activation. During the stance phase of walking in rats, length change up to about 3.1 mm in LG and 0.9 mm in SOL distal tendons have been reported . This corroborates with finding of Franz et al that the posterior AT had greater elongation than anterior AT during walking.…”
Section: Discussionsupporting
confidence: 89%
See 1 more Smart Citation
“…However, a different behavior was observed in the intact compartment and with a physiological pattern of activation. During the stance phase of walking in rats, length change up to about 3.1 mm in LG and 0.9 mm in SOL distal tendons have been reported . This corroborates with finding of Franz et al that the posterior AT had greater elongation than anterior AT during walking.…”
Section: Discussionsupporting
confidence: 89%
“…LG muscle‐tendon unit (MTU) lengths were estimated using an ankle‐knee geometric model by Ettema, while SOL MTU lengths were estimated by adjusting the model for ankle joint angle displacement only . The following anatomical parameters, required in the model, were measured from the animals of this study: ankle lever arm length (mean of 6.8 mm used in the model) and tibia length (38.3 mm).…”
Section: Methodsmentioning
confidence: 99%
“…Within the AT in particular, these differential displacements may be possible because of the presence of distinct subtendons for SOL, LG, and MG muscles (26), but with the applied imaging methods, it is not possible to identify the specific anatomic locations of the displacements in humans. New evidence from in vivo measurements in the rat indicates differential lengthening of the distal tendons of SOL and LG muscles during controlled muscle stimulations (30) and during locomotion (31). This suggests relative displacements between Achilles subtendons, which could, given the material properties of the intersubtendon matrix, facilitate intersubtendon force transmission.…”
Section: Force Transmission Within Tendonmentioning
confidence: 99%
“…The right hindlimb of all animals was surgically instrumented with sonomicrometry crystals (1 mm; Sonometrics, London, Ontario, Canada) using procedures previously reported in Bernabei et al 2017c). In short, a partial resection of the insertion sheath of the biceps femoris muscle was performed to access the compartment of SO and LGþPL muscles.…”
Section: Survival Surgeriesmentioning
confidence: 99%