A case of foreign accent syndrome in a patient affected by a complex functional movement disorder
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Foreign accent syndrome (FAS) is a prosody and articulation disturbance that makes people talk in their mother tongue with an intonation that resembles the one of a foreign person . FAS is a rare disorder; primarily, it has been described to be associated with left-hemisphere brain damage due to several causes (e.g., stroke or traumatic event) (organic FAS). Nevertheless, FAS has also been anecdotally described in patients affected by psychiatric disorders, such as bipolar disorder or conversion disorder ; in these conditions, FAS is not associated with any brain damage and is clearly not consistent with any structural neurological condition (functional FAS) . The differential diagnosis between organic and functional FAS is not always easy. However, the variability of the accent during examination, the absence of organic brain damage and the prompt improvement of the symptom are pathognomonic features of functional FAS .
Compliance with ethical standards
The Ethics Committee of San Paolo Hospital reviewed and approved the study protocol.
Conflict of interests
Authors have no conflict of interests to declare.
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