Not a scan, and not the same thing as an X-ray, CT, or MRI. An EMG is a test that measures how muscles and the nerves controlling them are working. Short for electromyography, it usually involves small needles placed into selected muscles, and it is often paired with nerve conduction studies that use mild electrical impulses on the skin. Together, these tests can help show whether pain, weakness, numbness, tingling, or loss of function is coming from a pinched nerve, nerve damage, or a muscle problem.

That matters after an injury because symptoms do not always show up clearly on imaging. A crash, fall, or hard twisting injury can leave someone with burning pain or hand weakness even when a basic scan looks "normal." An EMG may help document radiculopathy, peripheral nerve injury, neuropathy, or ongoing muscle denervation. That can affect diagnosis, treatment planning, work restrictions, and whether an insurer accepts that the injury is real and connected to the accident.

There is a trap here: a "normal" EMG does not automatically mean nothing is wrong. Timing matters, and some nerve problems are too early, too mild, or too localized to show up right away. In an Oregon injury or workers' compensation claim, the test is one piece of evidence - not the whole case. Insurers may lean on it when it helps them and ignore it when it does not.