Both sympathetic and parasympathetic nervous systems are involved in regulating pain
states. The activity of these systems seems to become disturbed in states of chronic pain …

Stress is a state of disharmony, or threatened homeostasis. A stressor could have a
psychological origin or a biological origin. Societies have become more intricate with …

Fibromyalgia (FM) is a non-inflammatory rheumatologic disorder characterized by
musculoskeletal pain, fatigue, depression, cognitive dysfunction and sleep disturbance …

Objectives: To assess the interaction between the sympathetic and parasympatheticsystems
in patients with fibromyalgia syndrome (FM), using power spectrum analysis (PSA) of heart …

Fibromyalgia syndrome (FS) is associated with a neuroendocrinal disorder characterized by
abnormal function of the hypothalamic-pituitary-adrenal (HPA) axis, including hyperactive …

Objective The goal of this systematic literature review is to determine whether there are
differences and similarities in heart rate variability (HRV) between adult patients with …

Treating patients who have chronic pain conditions has long held challenges and been rife
with pitfalls for health care professionals. Pain is a complex and dynamic phenomenon …

Objective To determine the accumulated 24‐hour cardiovascular autonomic modulation and
its circadian variations in patients with fibromyalgia, by means of heart rate variability …

Chronic fibromyalgia (FM) pain is prevalent (estimated as high as 13%), predominantly
affects women, and is associated with a variety of focal pain conditions. Ongoing FM pain is …

T HE MAIN COMPLAINT of patients with fibromyalgia (FM) is widespread pain. This is the
reason why patients with this illness are seen by rheumatologists. Nevertheless, very …