Efect of load and initial length on the work of the muscle trabecula
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A study was made of the changes occurring in trabeculae during working effort in response to various loads in relationship to the initial length. For this purpose, a longitudinal trabecula of the frog's auricle (stimulated by the sinus pacemaker) was used. The trabecula was isolated from the distal end. The experimental results demonstrated that with various loads optimal working effects could be obtained only with corresponding initial lengths of the trabecula. The latter proved incapable of even a slight working effort at the initial length with its distal end made free. Contraction of the trabecula with the minimal load becomes possible only after preliminary slight stretching.
KeywordsPublic Health Initial Length Minimal Load Working Effect Muscle Trabecula
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