Your Local Neurophysiology Experts

Receive an EMG Test from Our Highly-Qualified Neurophysiologists

Trust in our first-class neurophysiologists to provide a range of clinical services. Serving clients throughout Yorkshire, we provide services to those with suspected disorders/diseases of the peripheral nerves or muscles. These often include electrical tests which assess their function. Termed nerve conduction studies or electromyography (EMG), the tests are performed by our consultant clinical neurophysiologist.

The Procedure

Our team use nerve conduction studies to assess the electrical conduction of impulses travelling along your nerves. To measure this, a special recording electrode is placed onto your skin (usually on your hand, arm, or leg) and then another electrode is used to stimulate the skin. The stimulator produces small electrical pulses which feel like a sharp tapping sensation. It’s repeated for several different nerves. There are no side effects, although some find it uncomfortable. We usually use this method to examine nerves in your arms or legs. If the nerve is trapped, damaged, or diseased, the signals show differently.

EMG Testing

Electromyography (EMG) 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. During a needle EMG, a needle electrode is inserted directly into a muscle. It then records the electrical activity in that muscle.

EMG results reveal nerve dysfunction, muscle dysfunction, or problems with nerve-to-muscle signal transmission.

Reasons for Referrals

Your doctor may order an EMG if you have signs or symptoms that may indicate a nerve or muscle disorder. Such symptoms may include:

  • Tingling
  • Numbness
  • Muscle Weakness
  • Muscle Pain or Cramping
  • Certain Types of Limb Pain

EMG results are often necessary to help diagnose or rule out several conditions. These include the following:

  • Muscle disorders, such as muscular dystrophy or polymyositis.
  • Diseases affecting the connection between the nerve and the muscle, such as myasthenia gravis.
  • Disorders of nerves outside the spinal cord (peripheral nerves), such as carpal tunnel syndrome or peripheral neuropathies.
  • Disorders that affect the motor neurons in the brain or spinal cord, such as amyotrophic lateral sclerosis or polio.
  • Disorders that affect the nerve root, such as a herniated disk in the spine.

Our team are partnered with many clinics in the area. This allows us to provide this service throughout Yorkshire, and we are happy to speak to medical professionals about the referral process.

Precautions You Should Take

The doctor specialising in nervous system investigations (Clinical Neurophysiologist) will need to know if you have certain medical conditions. Please bring the list of your medication with you and tell your doctor and other EMG lab personnel if you:

  • Have a pacemaker or any other electrical medical device.
  • Take blood-thinning medications.
  • Have haemophilia, a blood-clotting disorder that causes prolonged bleeding.

How to Prepare

  • Take a shower or bath shortly before your examination to remove oils from your skin. Don't apply lotions or creams before the examination.
  • Please keep your hands and feet warm, as cold limbs can affect the results.
  • You should also avoid using any moisturisers, creams or lotions on your arms and legs on the day of the tests, as this can interfere with the recordings.
  • Please wear loose clothing and minimal jewellery, which may need to be removed.

Potential Side Effects/Risks

EMG and NCS tests have few side effects. Occasionally, the needle examination causes a small bruise. This is more common in patients on blood thinners or anti-inflammatory drugs (Ibuprofen or Aspirin). Infection at the needle sites is rare, given the skin’s natural defences and the small needle size. You may feel some soreness for a day or two following the test. There are no activity restrictions, and you can drive home afterwards. The tests are safe and can be performed on those with pacemakers or defibrillators.

The Results

The consultant Neurophysiologist interpret the results of your test and prepares a report. Your GP, or the doctor who requested the EMG, will discuss the report with you at a follow-up appointment.

Our References

View the following websites for further information: