An electromyogram (EMG) measures the electrical activity of muscles at rest and during contraction. Nerve conduction studies measure how well and how fast the nerves can send electrical signals.
Nerves control the muscles in the body with electrical signals called impulses. These impulses make the muscles react in specific ways. Nerve and muscle problems cause the muscles to react in abnormal ways.
If you have leg pain or numbness, performing these tests can help determine how much your nerves are being affected. These tests also check how well your spinal nerves and the nerves in your arms and legs are working.
An EMG can be performed at one of our convenient Weil Foot & Ankle Institute locations. This procedure is conducted by one of our EMG technologists or expert foot doctors, in a special room that stops any outside electrical interference.
You will be asked to lie on a table or bed or to sit in a reclining chair, so your muscles will be fully relaxed.
The skin over the areas to be tested is first cleaned, then covered with an electrode that is attached to a recording machine.
When the electrodes are securely in place, the electrical activity in that particular muscle is recorded while the muscle is at rest. Then the technologist or doctor asks you to slowly and steadily tighten or contract the muscle slowly, thus recording any electrical activity.
The electrode may be moved a number of times to record the activity in different areas of the muscle, or in different muscles.
The electrical activity in the muscle is shown as wavy and spiky lines on a video monitor, and may sound like popping noise on the speaker when the muscle is contracted. The activity may also be recorded on video for further evaluation.
An EMG may take 30 to 60 minutes. When the test is complete, the technician removes the electrodes and cleans your skin.
Please call our podiatry office in Merrillville, IN, at 847-390-7666 if you have any additional questions about EMGs or nerve conduction testing. We will be happy to provide you with all the information that you need. Come experience Weil Foot & Ankle Institute! Our Merrillville podiatrist offers 5-star rated podiatry care in Merrillville, Valparaiso, Portage, Munster, Schererville, Dyer, Chesterton, St. John, Crown Point, Porter, and Highland, IN.