Electromyography (EMG) Explained: What It Is & What It Diagnoses Electromyography—what exactly is it, and why would your doctor order one? In this video, we break down what an EMG (Electromyography) really is, how it works, and what it can diagnose. From nerve conduction studies to the needle muscle test, this powerful diagnostic tool helps determine whether your symptoms are coming from your neck, back, peripheral nerves, or muscles. If you're dealing with numbness, tingling, weakness, shooting