Foreign accent syndrome (FAS) is a rare speech disorder. A person with it sounds as if they are speaking with an accent from another country.
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FAS is caused by damage to the part of the brain that controls the rhythm and melody of speech. The damage may be due to:
Things that may raise the risk of FAS are:
Problems may last months, years, or may be permanent. People with FAS speak in a distorted rhythm and tone, such as:
A person with FAS may be able to speak easily and have others understand them. The accent may also be within the same language, such as American-English to British-English.
The doctor will ask about your symptoms and health history. A physical exam will be done. It will focus on the muscles used to speak. A mental health exam may also be done to rule out other causes.
Language skills will be tested. This can be done with:
Images will be taken of the brain. This can be done with:
The brain's electrical activity may be measured. This can be done with an electroencephalogram (EEG).
FAS is rare. A team of specialists may be needed to make the diagnosis.
The goal of treatment is to manage symptoms. Choices are:
There are no known guidelines to prevent this health problem. Stroke is the most common cause. People who are at risk for stroke should take steps to lower their risk.
Foreign Accent Syndrome Support—University of Texas at Dallas
National Institute on Deafness and Other Communication Disorders (NIDCD)
Heart and Stroke Foundation of Canada
Speech-Language and Audiology Canada
About FAS. Foreign Accent Syndrome (FAS) Support website. Available at: http://www.utdallas.edu/research/FAS/about. Accessed January 26, 2021.
Foreign accent syndrome. American Speech-Language-Hearing Association website. Available at: http://leader.pubs.asha.org/article.aspx?articleid=2278208. Accessed January 26, 2021.
Last reviewed December 2020 by EBSCO Medical Review Board Rimas Lukas, MD Last Updated: 1/26/2021