EMG is a required test for the diagnosis of motor neuron disease and an essential test technique for neurological disorders such as myasthenia gravis, peripheral neuropathy, and myelopathy. However, there are many patients who complain why EMG takes about several months to be done. When I was a trainee at Concordia Hospital, I found that the EMG appointment at the hospital was basically four months away. If you want to do it urgently, then you have to make an appointment at your own expense under the special needs fee, which is several times more expensive than the normal one. Electromyography is known as the most difficult and longest test at Concord Hospital. So, why does this test take so long? There is only one reason. That is: it takes too long to finish a test. The longest test I’ve ever had was 3 and a half hours, a whole morning. Electromyography is a test of clinical thinking for neurologists. Before the examination, a neurological examination and localization diagnosis should be performed for the condition, and then a targeted electromyography examination should be performed, and during the examination, the examination items should be adjusted according to the examination results at any time, and some difficult diseases do require a dozen muscle examinations for clarification. Therefore, electromyography is flexible, random, and a test accompanied by clinical thinking, not just an MRI or a CT scan. Therefore, it often takes nearly an hour for a simple patient, and it is difficult to estimate for a complex patient. If all the items are done, I am afraid that it will not be done in one day. So, for a EMG physician, only a few patients can be examined in a day, and for large hospitals, it is definitely a longer appointment. As far as I know, it takes about 3 months for electromyography at 301 Hospital, 3 months at Xuanwu Hospital, and 1 month at China-Japan Hospital. Our hospital has just started this technology and it takes about 3-7 days. For some patients with rapid disease development, this time is indeed too long and may affect the diagnosis of the disease, for example, acute Guillain-Barre, or amyotrophic lateral sclerosis. Patients can choose according to their own conditions, and the technique of EMG varies from person to person. In addition to experience, it is necessary to have a good understanding of neurological localization and diagnosis in order to truly understand and grasp the essence of electrophysiology, and to truly use EMG to make good localization and differential diagnosis of neurological diseases.