Automatic tracking of medial gastrocnemius fascicle length during human locomotion
نویسندگان
چکیده
منابع مشابه
Automatic tracking of medial gastrocnemius fascicle length during human locomotion.
During human locomotion lower extremity muscle-tendon units undergo cyclic length changes that were previously assumed to be representative of muscle fascicle length changes. Measurements in cats and humans have since revealed that muscle fascicle length changes can be uncoupled from those of the muscle-tendon unit. Ultrasonography is frequently used to estimate fascicle length changes during h...
متن کاملDistinct muscle fascicle length changes in feline medial gastrocnemius and soleus muscles during slope walking.
On the basis of differences in physiology, e.g., histochemical properties and spindle density, and the structural design of the cat soleus (SO) and medial gastrocnemius (MG) muscles, we hypothesized that 1) fascicle length changes during overground walking would be both muscle and slope dependent, which would have implications for the muscles' force output as well as sensory function, and that ...
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We studied force-sharing behavior between the cat medial gastrocnemius (MG) and soleus (SOL) muscles by direct measurement of the muscle forces and electromyographic activities (EMGs), muscle lengths, speeds of contraction, joint kinematics and kinetics, for a variety of locomotor conditions. Previous studies suggested that the modulation of MG force and activation is associated with movement d...
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 کاملOptimal muscle fascicle length and tendon stiffness for maximising gastrocnemius efficiency during human walking
Muscles generate force to resist gravitational and inertial forces and/or to undertake work on the centre of mass. A trade off in muscle architecture exists in muscles that do both; the fibres should 15 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 tim...
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ژورنال
عنوان ژورنال: Journal of Applied Physiology
سال: 2011
ISSN: 8750-7587,1522-1601
DOI: 10.1152/japplphysiol.00530.2011