The EMG does not show brain or spinal cord diseases. Problems in a muscle, the nerves supplying a muscle, the spinal cord, or the area of the brain that controls a muscle can cause these symptoms. Find the cause of weakness, paralysis, or muscle twitching. These problems may include a herniated disc, amyotrophic lateral sclerosis (ALS), or myasthenia gravis (MG). The second main component is Electromyography (EMG) – a technique for recording and evaluating the electrical activity produced by skeletal muscles.įind diseases that damage muscle tissue, nerves, or the junctions between nerve and muscle. One common measurement made in a study is the Nerve Conduction Velocity – hence this part of the suite is often referred to as “NCV”. The first is a nerve conduction study which is used to evaluate the electrical conduction of motor and sensory nerves. If you have any questions as to why you might need the test, ask your doctor. Many other medical problems might suggest the need for the test. This may include a pinched nerve in the back or the neck, tingling or numbness in arms or legs, or carpal tunnel syndrome. They are usually ordered when a patient is having problems with their muscles or nerves. NCV/EMG is a suite of measurements that a doctor may order to assist in making the right diagnosis for a medical condition. Nerve Conduction Velocity study / Electromyography
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