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EMBARGOED FOR RELEASE UNTIL 4 PM ET, September 17, 2014

Migraine in Middle Age Linked to Increased Risk of Parkinson’s, Movement Disorders Later

MINNEAPOLIS – A new study suggests that people who experience migraine in middle age may be more likely to develop Parkinson’s disease, or other movement disorders later in life. Those who have migraine with aura may be at double the risk of developing Parkinson’s, according to the study published in the September 17, 2014, online issue of Neurology®, the medical journal of the American Academy of Neurology. “Migraine is the most common brain disorder in both men and women,” said study author Ann I. Scher, PhD, with Uniformed Services University in Bethesda, MD, and a member of the American Academy of Neurology. “It has been linked in other studies to cerebrovascular and heart disease. This new possible association is one more reason research is needed to understand, prevent and treat the condition.” For the study, 5,620 people between the ages of 33 and 65 were followed for 25 years. At the beginning of the study, a total of 3,924 of the participants had no headaches, 1,028 had headaches with no migraine symptoms, 238 had migraine with no aura and 430 had migraine with aura. Later, the investigators assessed whether the participants had any symptoms of Parkinson’s or had been diagnosed with Parkinson’s or had symptoms of restless legs syndrome (RLS)(also known as Willis-Ekbom disease). The study found that people with migraine with aura were more than twice as likely to be diagnosed with Parkinson’s than people with no headaches. A total of 2.4 percent of those with migraine with aura had the disease, compared to 1.1 percent of those with no headaches. People with migraine with aura had 3.6 the odds of reporting at least four of six parkinsonian symptoms, while those with migraine with no aura had 2.3 times the odds of these symptoms. Overall, 19.7 percent of those with migraine with aura had symptoms, compared to 12.6 percent of those with migraine with no aura and 7.5 percent of those with no headaches. Women with migraine with aura were also more likely to have a family history of Parkinson’s disease compared to those with no headaches. “A dysfunction in the brain messenger dopamine is common to both Parkinson’s and RLS, and has been hypothesized as a possible cause of migraine for many years. Symptoms of migraine such as excessive yawning, nausea and vomiting are thought to be related to dopamine receptor stimulation,” said Scher. “More research should focus on exploring this possible link through genetic studies. “While the history of migraine is associated with an increased risk for Parkinson’s, that risk is still quite low.” The study was supported by the National Institutes of Health, the National Institute on Aging, the Icelandic Heart Association and the Icelandic Parliament. To learn more about migraine and movement disorders, please visit www.aan.com/patients.

The American Academy of Neurology is the world's largest association of neurologists and neuroscience professionals, with 32,000 members. The AAN is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer's disease, stroke, migraine, multiple sclerosis, concussion, Parkinson's disease and epilepsy.

For more information about the American Academy of Neurology, visit AAN.com or find us on Facebook, Twitter, LinkedIn and YouTube.


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