Figure 10.1 Illustration of the forces acting on the forearm while holding a ball weighing W in the hand. The biceps muscle force, B, acts upward on the ulna. The joint reaction force, R, and weight of the forearm, G, act downward. The vector sum of these forces must be zero to maintain static equilibrium. Similarly, the net moment about the joint centre must also be zero. These two conditions can be written algebraically as Equations 10.1 and 10.2.
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1972 ◽
Vol 43
(2)
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pp. 126-137
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1979 ◽
Vol 51
(3)
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pp. 433-456
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2011 ◽
Vol 14
(sup1)
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pp. 125-127
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2019 ◽
Vol 69
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pp. 156-163
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