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Fig. 6. Force-length characteristics of partially dissected rat medial
gastrocnemius (GM) muscle connected only at the level of the muscle belly by
extramuscular connective tissue (i.e. remnants of the general fascia and
epimysium). (A) Active forces exerted at the proximal tendon (closed symbols)
and at the distal tendon (calcaneal bone) (open symbols). (B) Passive forces
exerted at the proximal tendon (closed symbols) and at the distal tendon
(calcaneal bone) (open symbols). Muscle-tendon complex length
(Lm+t) is expressed as deviation from optimum GM
muscle-tendon complex length (L0). Force is shown as mean
± S.E.M.