Taken together, the NCS and EMG findings can demonstrate various patterns that may aid in the diagnosis of peripheral nerve and/or muscle disorders.
The electromyography (EMG) portion of the exam involves sampling various muscles by placing a very small and thin needle, roughly the size of an acupuncture needle, to examine the neuromuscular activity at rest as well as during an active muscle contraction. The NCS portion of the test can also provide information about the number or volume of nerve fibers picking up and transmitting information. how fast is the signal moving along the nerve fibers). This can provide information regarding the velocity at which information travels along a nerve (i.e. The nerve conduction studies (NCS) are performed first and involve stimulating a variety of nerves. An electrodiagnostic study (EMG/NCS) is typically performed to evaluate conditions that affect the peripheral nerves and/or muscles.
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