Nervous System Testing

Nervous system balance, also known as autonomic balance, refers to the relationship between the sympathetic nervous system (“fight or flight”) and the parasympathetic nervous system (“rest and digest”). This balance is essential for maintaining homeostasis—the body’s internal equilibrium—and adapting to constantly changing demands, both inside and outside the body.

When the autonomic nervous system is not functioning optimally, it can affect multiple body systems, including the cardiovascular, metabolic, neurological, and gastrointestinal systems. Autonomic dysfunction has been associated with a wide range of health conditions, including inflammatory, autoimmune, and neuropsychiatric disorders.

These conditions include:

  • Anxiety
  • Arrhythmias (irregular heart rhythms)
  • Autoimmune diseases
  • Certain cancers
  • Chronic fatigue syndrome
  • Chronic nausea and vomiting
  • Constipation
  • Depression
  • Type 2 diabetes
  • Dysautonomia
  • Erectile dysfunction
  • Fibromyalgia
  • Gastroparesis (delayed stomach emptying)
  • GERD (gastroesophageal reflux disease)
  • Heart attack
  • Heart failure
  • Hypertension (high blood pressure)
  • Insomnia
  • Metabolic syndrome and obesity
  • Neurodegenerative diseases
  • Neurogenic bladder
  • Post-COVID-19 syndrome
  • Renal (kidney) dysfunction

Nerve Express Testing

The Nerve Express test assesses autonomic nervous system function and physiological stress. It evaluates how well the body responds to stress, recovers from exertion, and the balance between sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) branches of the nervous system. It is a non-invasive test done in the office that takes about 15 minutes. 

What the Results Can Reveal

The results can show whether a person is stuck in sympathetic overdrive or has weakened parasympathetic tone. These conditions can underlie chronic issues such as anxiety, insomnia, digestive problems, and fatigue.

Sample Report Interpretation

Composite infographic titled 'Electrocardiographic Rhythm Strip': left side shows an ECG rhythm trace with SUPINE/Upright labels and tables; right side provides a framed plot comparing supine vs upright autonomic activity and a conclusion panel indicating changes in parasympathetic and sympathetic activity.
  • Parasympathetic activity: −4.0
  • Sympathetic activity: 1.0

In the sample report, chronic anxiety has depleted the patient’s nervous system, resulting in low parasympathetic tone and an inability to achieve homeostasis. Treatment focused on techniques to stimulate parasympathetic activity.

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