HPA Axis Role in Fibromyalgia & ME/CFS

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HPA Axis Role in Fibromyalgia & ME/CFS

Image result for HPA Axis Role in Fibromyalgia & ME/CFS The hypothalamus and pituitary are highlighted in blue. Dorling Kindersley/Getty Images

HPA axis is an abbreviation for a subsystem in your body called the hypothalamic-pituitary-adrenal axis. It describes a complex set of interactions between two parts of the brain—the hypothalamus and the pituitary glands—and the adrenal (or suprarenal) glands that are located at the top of each kidney.

The HPA axis also helps regulate a lot of other things in your body, such as your temperature, digestion, immune system function, mood, sexuality, and energy usage.

When you look at that list of functions, and then compare it to the known list of dysfunctions and symptoms of fibromyalgia and chronic fatigue syndrome, it’s not surprising that researchers went looking at how the HPA axis function in people with these conditions. That work has paid off, with disocveries linking both conditions to abnormalities in the HPA axis.

HPA Axis and Its Role in Central Sensitivity Syndromes 

In fact, some research suggests that the HPA axis plays a role in all central sensitivity syndromes, the family of illnesses fibromyalgia, chronic fatigue syndrome, and several other conditions that are believed to be in. Other central sensitivity syndromes include headache and migraine, irritable bowel syndrome, multiple chemical sensitivity, myofascial pain syndrome, TMJ (temporomandibular joint disorder), and restless legs syndrome.All of these illnesses are related to hyper-sensitivities of the central nervous system, which is made up of your brain and the nerves of the spinal column.

The role of the HPA axis in these disorders is not yet fully understood by researchers. So far, however, research suggests that it does play some kind of underlying role. Studies suggest that:
  • Decreased HPA-axis activity leads to a lowered cortisol response to stress in chronic fatigue syndrome. (Cortisol is one of the primary stress hormones.)
  • Lower cortisol reactivity is tied to more severe chronic fatigue syndrome symptoms, according to research published in the journal Health Psychology in 2015.
  • Childhood stressors may lead to dysfunction of the HPA-axis, which may in turn contribute to the development of conditions involving central sensitivity.
  • Regular mild exercise, such as stretching, may improve function of the HPA-axis in people with fibromyalgia.
  • HPA-axis dysfunction may be responsible for impaired function of the fascia, which is a body-wide network of connective tissues, in people with fibromyalgia.

Some researchers have called for new treatment strategies that target the dysfunctional HPA axis in these conditions.The HPA axis also is involved in anxiety disorder, bipolar disorder, post-traumatic stress disorder, clinical depression and burnout. Given the number of conditions its linked to, a treatment for HPA axis dysfunction could help many millions of people live fuller lives.As researchers learn more about the HPA axis itself, they may uncover valuable information about the conditions related to its dysregulation, including how to treat and prevent them.

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