scholarly journals Muscle architecture and passive lengthening properties of the gastrocnemius medialis and Achilles tendon in children who idiopathically toe‐walk

2021 ◽  
Author(s):  
Carla Harkness‐Armstrong ◽  
Constantinos Maganaris ◽  
Roger Walton ◽  
David M. Wright ◽  
Alfie Bass ◽  
...  
Keyword(s):  
Achilles Tendon ◽  
Muscle Architecture ◽  
Gastrocnemius Medialis

Slack length of gastrocnemius medialis and Achilles tendon occurs at different ankle angles

2013 ◽  
Vol 46 (14) ◽  
pp. 2534-2538 ◽  
Author(s):  
François Hug ◽  
Lilian Lacourpaille ◽  
Olivier Maïsetti ◽  
Antoine Nordez
Keyword(s):  
Achilles Tendon ◽  
Gastrocnemius Medialis ◽  
Slack Length

scholarly journals V-Y advancement flap for repair of neglected injuries of the Achilles tendon using 2 mini-incisions

2020 ◽  
Vol 14 (2) ◽  
pp. 123-125
Author(s):  
German Joannas ◽  
Leandro Casola ◽  
Guillermo Arrondo ◽  
Daniel Niño Gomez ◽  
Santiago Labbate
Keyword(s):  
Achilles Tendon ◽  
Average Distance ◽  
Advancement Flap ◽  
Popliteal Fossa ◽  
Medial Malleolus ◽  
Myotendinous Junction ◽  
Level Of Evidence ◽  
Gastrocnemius Medialis ◽  
Tendon Surgery ◽  
Mini Incision

Objective: To find a safe repair site for a proximal mini-incision to expose the fascia at the level of the gastrocnemius medialis (GM) myotendinous junction (MTJ). Methods: Seventeen anatomic specimens of popliteal fossa, leg, and foot fixed in formalin were dissected, and the perpendicular distance from the apex of the medial malleolus to the GM MTJ was measured. Results: The minimum and maximum perpendicular distances from the apex of the medial malleolus to the GM MTJ were 14.00cm and 20.5cm, respectively. Average distance was 16.56cm. Conclusion: We were able to establish a constant value and the average GM MTJ height, which allows for V-Y lengthening through 2 mini-incisions. In reviewing the literature, there was no description of the approaches proposed in this study. Level of Evidence VI; Therapeutic Studies; Case Series.Achilles tendon/surgery

Reproducibility of gastrocnemius medialis muscle architecture during treadmill running

2011 ◽  
Vol 21 (6) ◽  
pp. 1081-1086 ◽  
Author(s):  
Erasmia Giannakou ◽  
Nickos Aggeloussis ◽  
Adamantios Arampatzis
Keyword(s):  
Muscle Architecture ◽  
Treadmill Running ◽  
Gastrocnemius Medialis

scholarly journals Increasing the midsole bending stiffness of shoes alters gastrocnemius medialis muscle function during running

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sasa Cigoja ◽  
Jared R. Fletcher ◽  
Michael Esposito ◽  
Darren J. Stefanyshyn ◽  
Benno M. Nigg
Keyword(s):  
Achilles Tendon ◽  
Bending Stiffness ◽  
Shortening Velocity ◽  
Long Distance ◽  
Gastrocnemius Medialis ◽  
Long Distance Running ◽  
Muscle Fascicle ◽  
Running Shoes ◽  
Velocity Relationship ◽  
Stiff Shoes

AbstractIn recent years, increasing the midsole bending stiffness (MBS) of running shoes by embedding carbon fibre plates in the midsole resulted in many world records set during long-distance running competitions. Although several theories were introduced to unravel the mechanisms behind these performance benefits, no definitive explanation was provided so far. This study aimed to investigate how the function of the gastrocnemius medialis (GM) muscle and Achilles tendon is altered when running in shoes with increased MBS. Here, we provide the first direct evidence that the amount and velocity of GM muscle fascicle shortening is reduced when running with increased MBS. Compared to control, running in the stiffest condition at 90% of speed at lactate threshold resulted in less muscle fascicle shortening (p = 0.006, d = 0.87), slower average shortening velocity (p = 0.002, d = 0.93) and greater estimated Achilles tendon energy return (p ≤ 0.001, d = 0.96), without a significant change in GM fascicle work (p = 0.335, d = 0.40) or GM energy cost (p = 0.569, d = 0.30). The findings of this study suggest that running in stiff shoes allows the ankle plantarflexor muscle–tendon unit to continue to operate on a more favourable position of the muscle’s force–length–velocity relationship by lowering muscle shortening velocity and increasing tendon energy return.

Passive and dynamic muscle architecture during transverse loading for gastrocnemius medialis in man

2019 ◽  
Vol 86 ◽  
pp. 160-166 ◽  
Author(s):  
David S. Ryan ◽  
Norman Stutzig ◽  
Tobias Siebert ◽  
James M. Wakeling
Keyword(s):  
Muscle Architecture ◽  
Transverse Loading ◽  
Gastrocnemius Medialis

The Effect of Functional Home-Based Strength Training Programs on the Mechano-Morphological Properties of the Plantar Flexor Muscle-Tendon Unit in Children With Spastic Cerebral Palsy

2019 ◽  
Vol 31 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Annika Kruse ◽  
Christian Schranz ◽  
Martin Svehlik ◽  
Markus Tilp
Keyword(s):  
Cerebral Palsy ◽  
Strength Training ◽  
Achilles Tendon ◽  
Vastus Lateralis ◽  
Morphological Properties ◽  
Spastic Cerebral Palsy ◽  
Plantar Flexor ◽  
Flexor Muscle ◽  
Gastrocnemius Medialis ◽  
Home Based

Purpose: The purpose of this study was to investigate the effects of functional progressive resistance training (PRT) and high-intensity circuit training (HICT) on the mechano-morphological properties of the plantar flexor muscle-tendon unit in children with spastic cerebral palsy. Methods: Twenty-two children (12.8 [2.6] y old, Gross Motor Function Classification System levels I/II = 19/3) were randomly assigned to either a PRT group or an HICT group. The interventions consisted of functional lower limb exercises, which were performed at home 3 times per week for 8 weeks. Measurements at baseline, preintervention, postintervention, and follow-up were taken to assess ankle joint range of motion and the properties of the gastrocnemius medialis, vastus lateralis, rectus femoris, and Achilles tendon (eg, thickness, strength, stiffness). Results: Despite a nonsignificant increase in active torque in the HICT group, neither gastrocnemius medialis morphology nor Achilles tendon properties were significantly altered after the interventions. Vastus lateralis thickness increased following PRT only. Conclusions: Functional home-based strength training did not lead to significant changes at the muscular level in children with cerebral palsy. We therefore assume that a more specific stimulus of higher intensity combined with a longer training duration might be necessary to evoke changes in muscles and tendons in individuals with cerebral palsy.

Gastrocnemius medialis fascicle and Achilles' tendon behaviour during a quick-release movement

2013 ◽  
Vol 16 (sup1) ◽  
pp. 158-160
Author(s):  
S. Farcy ◽  
A. Nordez ◽  
S. Dorel ◽  
H. Hauraix ◽  
P. Portero ◽  
...  
Keyword(s):  
Achilles Tendon ◽  
Gastrocnemius Medialis ◽  
Quick Release
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