You will probably be given both an EMG (electromyography) and NCS/NCV test (nerve conduction velocity). The EMG is a test of the muscle’s electrical activity. It is used to test how a muscle responds to signals from the nerves responsible for their movement, called motor nerves. Nearly all these test include a test of how fast the motor nerve conducts electrical impulses, called a nerve conduction study (NCS) or nerve conduction velocity (NCV) test.
You will go through some minor electrical shocks and needle probes with these test, but they are not painful. I always find the tests interesting.