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What is familial hemiplegic migraine?

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Familial hemiplegic migraine is a rare type of migraine with an aura that includes muscle weakness. During the attack, you have trouble moving your body. It can range from muscle weakness to a total inability to move. The muscle weakness is fully temporary.

This type of migraine is often mistaken for epilepsy. People may feel confused during these attacks. The muscle weakness and movement troubles can last for hours or days. Familial hemiplegic migraine can run in families. In patients with familial hemiplegic migraine, at least one first- or second-degree relative may have this type of migraine. Experts have linked the disorder to a number of genetic mutations.

SOURCES:

International Headache Society: "Familial Hemiplegic Migraine (FHM)."

Dorland's Illustrated Medical Dictionary, 30th edition.

Bradley's Neurology in Clinical Practice, 6th edition.

Kirchmann, M. Neurology, March 2006.

American Headache Society: "Photosensitivity and the Headache Patient."

Sun-Edelstein, C. Clinical Journal of Pain, June 2009.

National Institute on Deafness and Other Communication Disorders: "Glossary."

UpToDate.

Reviewed by Arefa Cassoobhoy on January 30, 2020

SOURCES:

International Headache Society: "Familial Hemiplegic Migraine (FHM)."

Dorland's Illustrated Medical Dictionary, 30th edition.

Bradley's Neurology in Clinical Practice, 6th edition.

Kirchmann, M. Neurology, March 2006.

American Headache Society: "Photosensitivity and the Headache Patient."

Sun-Edelstein, C. Clinical Journal of Pain, June 2009.

National Institute on Deafness and Other Communication Disorders: "Glossary."

UpToDate.

Reviewed by Arefa Cassoobhoy on January 30, 2020

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