Motion
The patient should be asked to move their knee. Full range of motion is 0-135 degrees. If the patient has full range of motion and can move their knee on their own it is not necessary to move the knee passively.
- examination of crepitus - clicking of the joint with motion
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“We must not suppose that, because a man is a rational animal, he will, therefore, always act rationally; or, because he has such or such a predominant passion, that he will act invariably and consequentially in pursuit of it. No, we are complicated machines; and though we have one main spring that gives motion to the whole, we have an infinity of little wheels, which, in their turns, retard, precipitate, and sometime stop that motion.”
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—William Wordsworth (1770–1850)