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.
You might also like to view...
In health-system pharmacies, what replaces the prescription pad used for retail pharmacies?
A) POE B) Floor stock dispensing system C) Medication order form D) Automatic dispensing cabinet
A 76-year-old male is complaining of chest pain and dizziness. He has a rapid and weak pulse, and his skin is cool, pale, and sweaty. His blood pressure is 96/64, and he says he feels as though he might pass out. You should:
A) lay him supine and administer high-flow oxygen. B) prepare to suction his airway. C) have him lean forward and breathe deeply. D) perform a rapid secondary exam.