Which of the following elbow flexors produces the greatest amount of compression in the elbow joint and therefore is a stabilizer of the elbow?
a. Biceps brachii
b. Pronator teres
c. Brachioradialis
d. Brachialis
ANS: C
The biceps brachii and brachioradialis have insertions that lie close to the joint axis and therefore lend themselves to mobility and range of motion. The brachioradialis inserts at a distance from the joint, and the largest component of the muscle force goes toward joint compression. The pronator teres exerts only a slight amount of force at the elbow.
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