Appropriate preparation is important before getting the test done like letting the doctor know about any on-going medication, if you have bleeding disorder or if you have a pacemaker or any other device implanted in the body. There are a few other use of EMG as well like studying kinesiology, guiding botulinum toxin and phenol injections in the muscles, controlling signals for prosthetic limbs and for monitoring neuromuscular function in case of general anaesthesia done by neuromuscular-blocking drugs. Muscle disorders can be due to several reasons like polymyositis or muscular dystrophy, diseases like myasthenia gravis wherein the muscle and nerve connection gets affected, polio or amyotrophic lateral sclerosis (ALS) due to affected motor neurons in the spinal cord or brain, due to affected nerve root causing herniated disk in the spine or due to peripheral neuropathies or carpal tunnel syndrome. The symptoms of muscle or nerve disorder of the muscle could be numbness of the muscles, tingling, muscle cramp and weakness and pain in the limbs, paralysis and involuntary twitching of the muscles called tics. An EMG is recommended if your muscles indicate any disorder. The test helps check the health of the muscles and the motor neurons or the nerves that control the muscles.
Electromyography (EMG) is a diagnostic procedure to examine the electrical activity of muscles that are transmitted by the motor neurons in the muscles.
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