The shock is similar to one received when you touch a doorknob after walking across carpeting. Nerve conduction studies also may be used during treatment to test the progress being made.Īlthough you may initially be startled by the suddenness of the stimulation, it is not painful and most people are comfortable during the testing procedure. By stimulating the nerve at various places, the doctor can determine the specific site of the injury. If the nerve is damaged, however, the signal will be slower and weaker. In healthy nerves, electrical signals can travel at up to 120 miles per hour. As the current travels down the nerve pathway, the electrodes placed along the way capture the signal and time how fast the signal is traveling. Then the doctor stimulates the nerve with an electric current. The doctor conducting the test will tape wires (electrodes) to the skin in various places along the nerve pathway. NCS are often done along with the EMG to determine if a nerve is functioning normally.
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