Final answer:
Needle EMG does not show denervation immediately after radiculopathy; there is a latency period before denervation can be detected, making the statement false.
Step-by-step explanation:
The statement is False. Needle EMG (electromyography) does not show denervation in a limb muscle immediately after a radiculopathy. After nerve injury or damage due to radiculopathy, there is a latency period before denervation changes such as fibrillations or positive sharp waves become apparent on EMG. This latency period can be days to weeks. Therefore, if an EMG is performed too soon after the onset of radiculopathy, it might not yet show the denervation that typically indicates nerve damage.