Source: American Pain Society     Released: Thu 29-May-2008,
Fibromyalgia Pain Linked with Central Nervous System Disorder

Newswise — Fibromyalgia is a chronic pain condition that causes
widespread pain and tenderness throughout the body. A University of
Michigan study, published in The Journal of Pain, shows that
fibromyalgia is associated with central nervous system abnormalities
evidenced by patients’ elevated sensitivity to auditory and pressure
sensations.

The Michigan researchers studied 31 subjects to determine if there is
a global central nervous system problem underlying sensory processing
in fibromyalgia patients. They noted that few studies have employed
different stimuli in consistent ways and levels of intensity to
measure pain sensitivities in this patient group. In this study,
fibromyalgia patients and normal subjects were exposed to random
auditory and pressure stimuli.

Consistent with prior research, the fibromyalgia subjects in the study
showed greater sensitivity to auditory tones and reported higher
sensitivity to daily sounds. Further, significant associations were
observed between the auditory and pressure responses and support the
claim that such abnormalities maybe related to a common
pathophysiological mechanism. They also noted that fibromyalgia
subjects perceived auditory stimuli to be of the same intensity as
felt by control subjects, even though their actual intensity levels
were lower.

The authors concluded their findings show that fibromyalgia is
associated with a central nervous deficit in sensory processing.
Further research is needed to examine mechanisms governing these
perceptual abnormalities.

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