Question

10. A patient holds her elbow partially flexed under isometric conditions against a cable that transmits 15 pounds of force from the stack of weights. What is the force required from the elbow extensors given the following?

a). The forearm/hand segment weight is 17 N

b). Cable force = 15 lbs

c). Angle of forearm relative to the vertical is 25 degrees

d). Angle between the cable and the forearm/hand is 70 degrees

e). Angle of extensor tendon insertion relative to the forearm = 20 degrees

f). Distance from the elbow joint center to the center of gravity of the forearm/hand segment = 0.18 m

g). Distance from the elbow joint center to the cable stirrup handle is 0.33 m

h). Distance from the elbow joint center to the extensor tendon insertion = 2 cm

Answer 1