A review of almost 200 published papers on sympathetic nervous system functioning in fibromyalgia, chronic fatigue syndrome, irritable bowel syndrome, and interstitial cystitis indicated that 72% of the studies found some sort of SNS dysfunction was present. Most found sympathetic nervous system over-activation but 7% found parasympathetic nervous system over-activation.
The review suggested autonomic nervous system problems could underlie these often co-morbid disorders. They recommended trying pharmacological and nonpharmacological measures to try and restore ‘autonomic balance’.
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