Final answer:
Disuse atrophy in the muscles surrounding an injury can begin after approximately two weeks of inactivity.
Step-by-step explanation:
Disuse atrophy in the muscles surrounding an injury begins after a period of inactivity. The exact time frame can vary depending on several factors such as the severity of the injury and individual differences. However, it is generally observed that disuse atrophy can start to occur after about two weeks of inactivity following an injury. Disuse atrophy in the muscles surrounding an injury begins after a period of inactivity that typically spans a couple of days to weeks. Physiotherapists often target muscles susceptible to atrophy by prescribing and monitoring exercises designed to stimulate those muscles following an injury, surgery, or even a stroke. Muscle atrophy due to disuse can often be reversed with exercise, contrasting with the irreversible sarcopenia associated with aging. However, for the purposes of the multiple-choice question provided, there is no specific detailed answer given in the reference material for the exact time frame at which disuse atrophy begins. Therefore, based on general medical knowledge, a safe answer would suggest that disuse atrophy begins to occur after a period of inactivity lasting longer than mere hours but not as long as months, making two weeks (C) the most plausible answer.