A 32-year-old male was injured in a motor vehicle accident and confined to bed for 3 weeks. During this time, the size and strength of muscle fibers decreased, a condition referred to as:
a. myelodysplasia.
b. ischemic atrophy.
c. disuse atrophy.
d. fibromyalgia.
ANS: C
The term disuse atrophy describes the pathologic reduction in normal size of muscle fibers after prolonged inactivity from bed rest, trauma (casting), or local nerve damage as can be seen with spinal cord trauma or polio. Ischemic atrophy is due to decreased blood flow.
Such an experience would not result in either myelodysplasia or fibromyalgia.
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