Biarticular Muscle
Muscle, Joint, Hamstring, gastrocnemius
978-613-8-18211-5
6138182111
72
2011-11-03
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Biarticular muscles are muscles that cross two joints rather than just one, such as the hamstrings which cross both the hip and the knee. The function of these muscles is complex and often depends upon both their anatomy and the activity of other muscles at the joints in question. Their role in movement is currently poorly understood.Biarticular muscles cross two joints in series, usually in a limb, but the details of the origin (proximal attachment) and insertion (distal attachment) can play a large role in determining muscle function. For instance, the human gastrocnemius technically spans both the knee and ankle joints. However, the origin point of the muscle is so close to the axis of rotation of the knee joint that the muscle's effective lever arm would be very small, especially compared to its large lever arm at the ankle (needs citation!).
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Биология
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