When does a doctor perform a emg? and what symptoms would you need to have one performed in your neck?

Typically whenever: ...patients complain of shooting or burning pains traveling from either their neck down their arms or their backs into their legs. Or if there is sudden progressive unexplained weakness, loss of muscle mass, twitching, etc. in a limb. And if there are altered sensations which suggest damage to a nerve or absence of a reflex. There are other instances as well but that covers a good chunk of cases.

EMGs: Are used to pinpoint nerve problems. Like if you have tingling in your hand or fingers they might do an EMZg to see if the problem is a nerve in the hand or arm or in your neck. Sometimes it is hard to sort just with imaging and this study is important to get treatment right

For neuropathy: Any number of conditions can cause an abnormal functioning of nerves. Carpal tunnel syndrome in the hands, bulging discs anywhere in the spine and some neuromuscular disorders can all require an EMG to further identify the problem. If you have narrowing in the neck from arthritis or a bulging disc, the EMG can help localize and help sort out the problem. Symptoms can be pain and numbness.