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NCS/EMG Tests

Nerve conduction studies

Nerve conduction studies (NCS) measure how quickly a nerve is working. Pads are placed on the skin surface and the nerve is stimulated. This feels like a tapping or tingling sensation which could be uncomfortable.

Electromyogram

An additional test, an Electromyogram (EMG) might be performed on some patients to test how well the muscles are working. This is a diagnostic procedure to assess the health of muscles and the nerve cells that control them (motor neurons).

Motor neurons transmit electrical signals that cause muscles to contract. An EMG translates these signals into graphs, sounds or numerical values that a specialist interprets.

An EMG uses tiny devices called electrodes to transmit or detect electrical signals. During a needle EMG, a needle electrode inserted directly into a muscle records the electrical activity in that muscle.

There are no after effects from either test.

On a cold day, could you please make sure that you wear gloves. Your hands should be warm for this examination. Please avoid using any form of oils or creams on the hands and wear loose clothing that allows access to elbows and knees.

Please do not wear an excessive amount of rings/jewellery as they may have to be removed for the test.

See more about the test in our Patient Information Sheets

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