Gastrocnemius tendon length and strain are different when assessed using straight or curved tendon model
نویسندگان
چکیده
منابع مشابه
A computational model for the adaptation of muscle and tendon length to average muscle length and minimum tendon strain.
This paper hypothesizes that average muscle length and minimum tendon strain govern muscle and tendon length adaptation in all situations. A model has been implemented to test this hypothesis, and simulations have been performed for normal development, bone lengthening, immobilization, and retinacular release experiments in young and adult animals. The simulation results predict that both muscl...
متن کاملAchilles tendon length and medial gastrocnemius architecture in children with cerebral palsy and equinus gait.
BACKGROUND The aim of this study was to examine both the tendon and muscle components of the medial gastrocnemius muscle-tendon unit in children with cerebral palsy (CP) and equinus gait, with or without contracture. We also examined a small number of children who had undergone prior surgical lengthening of the triceps surae to address equinus contracture. METHODS Ultrasound was used to measu...
متن کاملOptimal muscle fascicle length and tendon stiffness for maximising gastrocnemius efficiency during human walking and running.
Muscles generate force to resist gravitational and inertial forces and/or to undertake work, e.g. on the centre of mass. A trade-off in muscle architecture exists in muscles that do both; the fibres should be as short as possible to minimise activation cost but long enough to maintain an appropriate shortening velocity. Energetic cost is also influenced by tendon compliance which modulates the ...
متن کاملInfluence of neglecting the curved path of the Achilles tendon on Achilles tendon length change at various ranges of motion
Achilles tendon length has been measured using a straight-line model. However, this model is associated with a greater measurement error compared with a curved-line model. Therefore, we examined the influence of neglecting the curved path of the Achilles tendon on its length change at various ranges of motion. Ten male subjects participated in this study. First, the location of the Achilles ten...
متن کاملEffects of running on human Achilles tendon length-tension properties in the free and gastrocnemius components.
The elastic properties of the human Achilles tendon are important for locomotion; however, in vitro tests suggest that repeated cyclic contractions lead to tendon fatigue - an increase in length in response to stress applied. In vivo experiments have not, however, demonstrated mechanical fatigue in the Achilles tendon, possibly due to the limitations of using two-dimensional ultrasound imaging ...
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ژورنال
عنوان ژورنال: European Journal of Applied Physiology
سال: 2011
ISSN: 1439-6319,1439-6327
DOI: 10.1007/s00421-011-1929-9