Imagine your accent changed over night. You’re a middle aged woman who has lived in New York City all your life when a car hits you and you have a traumatic head injury. Shortly after, you awake in a hospital bed, but your recognizable Long Island accented voice has disappeared and it sounds like your Croatian, and you have never even left the U.S!
This rare condition is known as foreign accent syndrome (FAS) and usually occurs after strokes and as mentioned above, traumatic head injuries. FAS is acquired where the patient still remembers their native language, but they place stress and pitch on different words resulting in a change of speech rhythm (Foreign Accent Syndrome). According to one case study, an African American woman with diabetes, hypertension, and goiter noticed her accent shifted so her words ended with “-ahh” similar to a Jamaican accent (Tran et al.). That was one extreme of the spectrum, while other case studies have reported patients’ accents changing minorly so they sound like they are from another province such as a 71-year old Korean woman who was reported as having Cholla-buk regional accent and switched to a accent in the Kagwon province. These accent changes can be attributed to impaired motor function which leads to incorrect tongue placement and slurred vowels and consonants (Tran et al.).
In a comparative verbal study, A FAS patient fluent in Italian was compared to several healthy subjects. The FAS patient had a tumor surrounding his prefrontal gyrus and as a result there was sparse activation in this area. Corresponding motor functions of the tongue, lips, and larynx were impaired changing the patient’s rhythm of speech and a perceived overall change in accent (Tomasino et al.)(Sakurai et al.).
From my own experience, I had a friend in high school whose mother had a stroke a few years prior to me meeting her. She had apparently grown up in Sacramento, and had perfectly recognizable California accent, but when I was introduced to her after the stroke I thought she had recently immigrated from Germany because of her guttural pronunciation of certain words. Her original accent has returned slowly and her slurred speech has diminished concurrently. Whether patients can recover their native accents is questionable as it may depend on the extremity of their stroke or head injury.
Tomasino B, Martin D, Maieron M, Ius T, Budai R, Fabbro F, Skrap M. 2011.Foreign accent syndrome: a multimodal mapping study. Cortex 49(1) 18-39.
Foreign Accent Syndrome (FAS) Support, University of Texas Dallas, http://www.utdallas.edu/research/FAS/about/
Sakurai Y, Ito K, Sai K, Lee S, Abe S, Terao Y, Mannen T. 2014. Impaired Laryngeal voice production in a patient with foreign accent syndrome. Neurocase 21(3) 289-298
Tran AX, Mills AD. 2013. A case of Foreign Accent Syndrome. Journal of Emergency Medicine 45(1) 26-29