Question

why does range of motion need to be measured separately for each joint?
a. the average ranges of motion of joints are not known.
b. each joint has a different range of motion.
c. range of motion can change rapidly in a joint.
d. none of the above
please select the best answer from the choices provided.
a
b
c
d

Explanation:

To determine the answer, we analyze each option:

• Option A: Average ranges of motion for joints are known (e.g., from anatomical studies), so this is incorrect.
• Option B: Different joints (like the knee vs. the shoulder) have distinct structures and functions, leading to different ranges of motion. Thus, measuring each separately is necessary, making this correct.
• Option C: While range of motion can change, the primary reason for separate measurement is the inherent difference between joints, not rapid change, so this is incorrect.
• Option D: Since B is correct, D is incorrect.

Answer:

B. Each joint has a different range of motion.