Electromyography in Bradenton, FL
Electromyography (EMG) and Nerve Conduction Studies (NCS) are specific tests for the nerves and muscles of the human body. This testing is part of what is known as Electrodiagnosis, which is the use of electrical recording devices in making a clinical diagnosis. Examples besides EMG, are electroencephalography, cystometrography, and electrocardiography. Dr. Schwartz is one of the few chiropractors in the entire country, who is board certified in this field. More commonly, the tests are administered by neurologists. EMG and NCS are used to determine if spinal or peripheral nerves are damaged and whether the damage is permanent.
Electromyography actually consists of three parts:
- Directed history and neurologic examination
- Nerve Conduction Studies (NCS)
- Electromyography (EMG)
The history and neurologic examination are performed first to learn the nature of the problem, whether it is likely neurologic or neuromuscular, to determine which nerves or muscles are most affected, and to help focus the NCS and EMG. It generally takes 10 - 15 minutes.
NCS are performed next and take about 30-45 minutes. While lying down, surface electrodes are placed over the skin and muscles. The nerves which supply those areas or muscles are then stimulated with a probe and the resulting electrical responses are recorded by the surface electrodes which are connected to an EMG machine. The responses provide detailed information about nerve function. The stimuli feel like tingling sensations.
The EMG is performed last and takes about 15 minutes. During this test, a very thin wire is placed in one or more muscles in the arm, leg, back or neck. The electrical activity of the muscle is fed back through the electrode to the EMG machine when the muscle is at rest and then when the muscle is voluntarily contracted by the patient. The electrical information provides precise information about muscle function and the nerve/muscle junction. There is no electrical stimulation during this part of the test.
At the end of the study, the results of the entire test are combined and interpreted to reach a precise diagnosis. A detailed report is then produced. Dr. Schwartz provides these tests in his office for his own patients and also works with other physicians.