can an emg determine if there is numbness
A nerve conduction velocity (NCV) test is often done at the same time as an EMG. Purpose of an EMG Test. An EMG is often used to evaluate unexplained muscle weakness, twitching or paralysis, and to find the causes of numbness, tingling and pain. EMG testing can differentiate between true weakness and reduced use because of pain or lack of motivation. It can also determine whether a muscle disorder begins in the muscle itself or is caused by a nerve disorder. How is an EMG Test Done? In an EMG, a physician or technician inserts a very fine needle, which serves as an electrode, through the skin into the muscle.
A nerve conduction study can show if the motor neurons within a muscle are sending strong or weak signals, and it also assesses signal speed. Doctors may order an EMG in patients who have nerve pain, muscle spasms or weakness, tingling and numbness. Some conditions that may cause signs of nerve damage include spinal disorders such as herniated discs, peripheral nerve disorders that affect the limbs, and neuromuscular disorders such as muscular dystrophy.