Symptoms like tingling, numbness, and muscle spasms or weakness may be red flags alerting you to a nerve or muscle problem. When diagnosing neuromuscular conditions, the skilled team at Dayton Center for Neurological Disorders (DCND) often perform electrodiagnostic studies such as electromyography (EMG) and nerve conduction studies (NCS). If you need electrodiagnostic studies, your primary care provider refers you to DCND, and then the office staff will call you to schedule an appointment.
An EMG is a diagnostic test Dayton Center for Neurological Disorders uses to measure the electrical activity between nerves and muscles. The test reveals information about the extent and location of injured nerves and muscles.
Your provider may recommend an EMG to determine the cause of symptoms such as:
You may also have trouble with everyday activities like walking, holding objects, or buttoning clothes.
An EMG may diagnose numerous muscles and nerve conditions, including:
These are only a few examples of conditions most often diagnosed during an EMG.
Your neurologist may perform a second test, a nerve conduction study (NCS), at the same time as your EMG:
After locating the muscle being studied, your provider inserts very fine (thin) needles into the muscle. Once the needles are in place, your provider asks you to contract (tighten) and relax your muscles.
The needles hold tiny electrodes that pick up normal and abnormal nerve signals associated with your muscle movements.
The nerve conduction study, also called a nerve conduction velocity (NCV) test, shows how fast an electrical signal travels along a specific nerve. Your provider places several electrodes on your skin above the nerve.
Then they send a mild electrical impulse into one end of the nerve, triggering a nerve signal that travels through the nerve. Each electrode along the nerve’s path picks up the electrical activity, providing information about the speed and strength of the signal along the nerve.
If you need an EMG and/or NCS test and you’re not a patient, your primary care doctor refers you to Dayton Center for Neurological Disorders. After you’re referred, the office will call you back to set up an appointment for your electrodiagnostic procedures.