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Electromyography (EMG) is a diagnostic test that assesses muscle and nerve health by measuring electrical activity in muscles. During an EMG, a provider inserts small needle electrodes into a patient's muscle to record electrical signals both at rest and during muscle activation. The test helps evaluate conditions causing tingling, numbness, and weakness. It takes 30 to 60 minutes to complete and may cause minor bruising or tenderness at the needle sites.



