They are special tests used to detect neuromuscular junction disorders (nerve and muscle problems). Electromyography (EMG) can measure the electrical activity of muscles. Nerve Conduction Study (NCS) can measure the speed and amplitude of electrical signals that travel along the nerves.
Bathe or shower but do not use any oils, lotions or creams as they may interfere with the test.
Eat your normal meals at the usual times.
Avoid caffeine and tobacco for a few hours before the test.