Transcranial Magnetic Stimulation (TMS) Test

What is Transcranial Magnetic Stimulation (TMS) Test?

Transcranial Magnetic Stimulation (TMS) is a test that uses magnetic fields to stimulate specific areas of the brain, and transmitted electrical signals are recorded in the hands and feet.

Your doctor may recommend TMS for assessment of: 

• Corticospinal tract integrity
• Spinal cord disorders

This list is non-exhaustive.

How should I prepare for TMS Test?

• Not required to fast.
• Remove metallic accessories around the head (e.g. hairpins, earrings).
• Continue with your regular diet and medications (unless instructed differently by your doctor.
• Please contact your designated neurodiagnostic laboratory if you have:
  • A device implanted in your heart/abdomen (pacemaker) or brain (intracranial device or neurostimulator, clips, coils, implanted hearing devices).
  • A history of seizures or epilepsy.

How is TMS Test performed?

The test is done by a neurologist and will take around 30 minutes.

• You will be seated comfortably on a couch.
• Adhesive electrodes (sticky pads) will be put on your hands and feet to record transmitted nerve signals. 
• A magnetic coil is placed gently on your scalp, and single magnetic pulses are delivered to targeted areas of the brain.
• You may feel a muscle twitch on your arms and/or legs, which is normal.
• You can resume your normal daily activities after the test has ended.
• A detailed report will be sent to your doctor within two weeks. Your doctor will discuss the findings with you at your next appointment.

Frequently Asked Questions about TMS Test

Is the test safe?

Yes, TMS is generally safe. It is:

• Non-invasive (no surgery or needles).
• Targeted to specific areas of the brain.
• Widely used in neurological and rehabilitation settings.
• Seizures are a very rare side effect. Your doctor will assess your suitability to minimise risks.
• The neurologist and neurotechnologist will be with you throughout the process. If you feel unwell, please inform the neurologist or the neurotechnologist.

Can I use Medisave to pay for this test?

This test may be claimable under:

• Flexi-MediSave for Seniors; or
• Outpatient scans for diagnosis or treatment of a medical condition.

Please refer to the Ministry of Health's Outpatient Care page for the latest claim limits and eligibility criteria.

The information is correct as of July 2026 and subject to revisions without notice.