Your patient demonstrates limited wrist flexion. Which of the following ligaments would be taut in full wrist flexion?
a. Volar radiocarpal ligaments
b. Dorsal radiocarpal ligaments
c. Radial collateral ligament
d. Quadrate ligament
ANS: B
The roles of the ligaments of the radiocarpal joint are diverse in regard to guiding and checking motion of the carpals during active movement. Although the role of these ligaments may be more complicated than presented in this question, it would still stand to say that the ligaments on the dorsal side of the joint would be responsible for checking wrist flexion, and those on the volar side would be best suited to check wrist extension.
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