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Surgery
Which of the following events accompanies the rapid voluntary flexion of the arm?
An increase in the activity of the Ia afferent fibers from the biceps (the agonist)
A decrease in the activity of the Ib afferent fibers from the biceps (the agonist)
An increase in the activity of the Ia afferent fibers from the triceps (the antagonist)
A decrease in the activity of the Ib afferent fibers from the triceps (the antagonist)
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