If you mean professional engineer then your answer will depend on your country of origin. In the US, you do not need to have a degree. Check out the NYS PE licensure educational/experience requirements table here: Table Without a degree, it requires you to have six years of relevant, recorded, and proven experience until you are eligible to sit for the Fundamentals of Engineering examination.
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Electromyography (EMG) is an electrical recording of muscle activity that aids in the diagnosis of neuromuscular disease. Muscles are stimulated by signals from nerve cells called motor neurons. This stimulation causes electrical activity in the muscle, which in turn causes contraction. This electrical activity is detected by a needle electrode inserted into the muscle and connected to a recording device. Together, the electrode and recorder are called an electromyography machine.