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  • Title: Force-length properties and functional demands of cat gastrocnemius, soleus and plantaris muscles.
    Author: Herzog W, Leonard TR, Renaud JM, Wallace J, Chaki G, Bornemisza S.
    Journal: J Biomech; 1992 Nov; 25(11):1329-35. PubMed ID: 1400534.
    Abstract:
    The purpose of this study was to measure isometric force-length properties of cat soleus, gastrocnemius and plantaris muscle-tendon units, and to relate these properties to the functional demands of these muscles during everyday locomotor activities. Isometric force-length properties were determined using an in situ preparation, where forces were measured using buckle-type tendon transducers, and muscle-tendon unit lengths were quantified through ankle and knee joint configurations. Functional demands of the muscles were assessed using direct muscle force measurements in freely moving animals. Force-length properties and functional demands were determined for soleus, gastrocnemius and plantaris muscles simultaneously in each animal. The results suggest that isometric force-length properties of cat soleus, gastrocnemius and plantaris muscles, as well as the region of the force-length relation that is used during everyday locomotor tasks, match the functional demands.
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