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Pain Appears Common Among Patients With Parkinson's Disease

Date:
September 11, 2008
Source:
JAMA and Archives Journals
Summary:
Pain appears to be more common in individuals with Parkinson's disease than in those without, suggesting that pain is associated with the condition, according to a new report.

Pain appears to be more common in individuals with Parkinson's disease than in those without, suggesting that pain is associated with the condition, according to a new report.

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"Patients with Parkinson's disease often complain of painful sensations that may involve body parts affected and unaffected by dystonia," or involuntary muscle contractions, the authors write as background information in the article. This pain may resemble cramping or arthritis, or have features of pain caused by nerve damage. "The high frequency of these pain disorders in the general population makes it hard to establish whether pain is more frequent among people with Parkinson's disease than among age-matched controls."

Giovanni Defazio, M.D., Ph.D., of the University of Bari, Italy, and colleagues compared 402 patients with Parkinson's disease to 317 healthy individuals who were the same age. Participants provided information about their current age, the age at which they developed Parkinson's disease, scores on disease rating scales and details regarding any pain that was present at the time of the study and lasted for at least three months.

Overall, pain was more common among Parkinson's disease patients than among controls (281 or 69.9 percent vs. 199 or 62.8 percent). This was mainly attributable to dystonic pain, as rates of pain not associated with dystonia were similar among individuals with Parkinson's disease (267 or 66.4 percent) and those without (199 or 62.8 percent).

"Nevertheless, we observed a significant association between Parkinson's disease and non-dystonic pain, beginning after the onset of parkinsonian symptoms," the authors write. "Cramping and central neuropathic [nervous system–related] pain were more frequent among Parkinson's disease patients than controls. About one-quarter of patients who experienced pain reported pain onset before starting antiparkinsonian therapy."

Basal ganglia, structures deep in the brain that control movement and are damaged in patients with Parkinson's disease, also are involved with pain processing, the authors note. This might account for the increase in pain associated with Parkinson's disease.

"These data support the hypothesis that pain begins at clinical onset of Parkinson's disease or thereafter as a non-motor feature of Parkinson's disease," they conclude. "The findings of this study may have implications for designing studies aimed at understanding pain mechanisms in Parkinson's disease and identifying specific treatment strategies."


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Defazio et al. Pain as a Nonmotor Symptom of Parkinson Disease: Evidence From a Case-Control Study. Archives of Neurology, 2008; 65 (9): 1191 DOI: 10.1001/archneurol.2008.2

Cite This Page:

JAMA and Archives Journals. "Pain Appears Common Among Patients With Parkinson's Disease." ScienceDaily. ScienceDaily, 11 September 2008. <www.sciencedaily.com/releases/2008/09/080908185222.htm>.
JAMA and Archives Journals. (2008, September 11). Pain Appears Common Among Patients With Parkinson's Disease. ScienceDaily. Retrieved April 21, 2015 from www.sciencedaily.com/releases/2008/09/080908185222.htm
JAMA and Archives Journals. "Pain Appears Common Among Patients With Parkinson's Disease." ScienceDaily. www.sciencedaily.com/releases/2008/09/080908185222.htm (accessed April 21, 2015).

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