Autonomic Nervous System Testing

Autonomic nervous system testing is used to assess whether the autonomic nervous system (ANS) is functioning normally. The ANS controls automatic body functions, such as body temperature, digestion, and breathing. Any issue with the ANS is called dysautonomia.

Dysautonomia may result from diabetes, heart disease, some medications, autoimmune conditions, head trauma, neuropathy, and some infections.

Who needs Autonomic Nervous System Testing?

ANS testing is recommended for patients who experience dizziness, fainting spells, sweating issues, rapid heartbeat, or temperature instabilities (to name a few).

Many families come in after noticing these changes, unsure if it’s just aging or something more. If forgetfulness starts interfering with daily life—such as cooking, paying bills, or getting dressed—it’s time for a neurological evaluation.

Procedure

There are different Autonomic Nervous System Tests, such as: 

  • Valsalva Maneuver (with Deep Breathing Test): Measures heart rate and blood pressure during breathing. The technician will place electrodes on the chest, and you will be asked to take slow but deep breaths. The Valsalva maneuver requires breathing out through a mouthpiece with the nose shut. The electrodes will record heart rate, while a blood pressure cuff will measure the pressure.
  • Quantitative Sudomotor Axon Reflex Test (QSART): This test measures the nerves that control sweating. The patient is asked to lie flat on a table, and the technician will place electrodes on the testing sites after cleaning the skin. The electrodes are usually placed on the foot, leg, and wrist. The electrodes have a substance that causes sweating. The technician will send mild electrical currents through the electrodes, and the test will assess how the sweat glands and associated nerves respond.

When to Reach Out

 If you or a loved one in Westchester or NYC has been dealing with symptoms discussed here, you should immediately schedule a consultation.

Call our office at (914) 816-1941 for an appointment, or you can email us at info@chesterneurology.com to discuss your questions and concerns.

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