1. Under which circumstances would you expect brachioradialis to be recruited for elbow extension?
a. wrist flexed
b. forearm fully pronated
c. forearm in neutral position
d. to overcome heavy resistance
e. none of the above
2. How would you explain electrical activity in triceps during pronation of the forearm with the elbow held in 65 degrees of flexion?
a. triceps is working to concentrically flex the elbow
b. triceps brachii is acting to counter (stabilize) a flexion moment of pronator teres at the elbow
c. triceps is acting in this position as a secondary flexor of the elbow
d. none of the above
3. When would you expect the force (moment) arm of biceps brachii to be greatest?
a. forearm fully pronated
b. forearm fully supinated
c. forcearm in neutral position
d. during high velocity elbow flexion
Posted November 9, 2000