Foreign accent syndrome (FAS) is a rare speech disorder characterized by the emergence of a new, seemingly foreign accent in a person’s native language. The search results provide insights into FAS occurring in functional neurological disorders and after mild traumatic brain injuries (mTBIs).<\/p>\n\n\n\n
Several search results [1][4][7] indicate that FAS can manifest as a functional speech disorder (FSD) or functional neurological disorder (FND), where there is no clear structural brain lesion or neurological cause identified. In these cases, FAS is considered to have a psychogenic or functional etiology, potentially triggered by psychological factors or stress.<\/p>\n\n\n\n
The study in [1] describes a case of FAS characterized as an FSD, where the patient developed an “Eastern European accent” along with nonnative word use and word order changes after a functional movement disorder. Behavioral intervention helped correct the sound-level changes and resolve the language dialect-like changes.<\/p>\n\n\n\n
Result [7] notes that positive features of functional FAS, such as inconsistency, intermittency, and incongruence with structural lesions, can be present even in cases with structural brain damage. The study found that functional features were present in all cases, regardless of the probable etiology (functional, structural, or mixed).<\/p>\n\n\n\n
Several search results [2][5][13] report cases of FAS developing after mild traumatic brain injuries (mTBIs) or closed head injuries, even in the absence of significant structural brain lesions on imaging.<\/p>\n\n\n\n
In [13], the patient experienced FAS without other neurological deficits after a minor head injury. Single-photon emission computed tomography (SPECT) suggested abnormal function in the left dorsolateral inferior frontal gyrus and caudate nucleus as the underlying basis, despite normal magnetic resonance imaging (MRI) findings.<\/p>\n\n\n\n
Result [5] describes a case of FAS developing after an mTBI, suggesting that even mild brain injuries can potentially lead to the emergence of this speech disorder.<\/p>\n\n\n\n
Overall, the search results indicate that FAS can occur in functional neurological disorders without a clear structural cause, as well as after mTBIs, potentially due to subtle functional or metabolic changes in the brain not detected by conventional imaging techniques [1][4][7][2][5][13].<\/p>\n\n\n\n
Citations:
[1] https:\/\/www.semanticscholar.org\/paper\/b0cec3ba1553b8a48b0a85480a1a7e10bdcfd9a0
[2] https:\/\/www.semanticscholar.org\/paper\/680e2fc552518a0b9b890aed4eeab5971399025b
[3] https:\/\/pubmed.ncbi.nlm.nih.gov\/38015188\/
[4] https:\/\/pubmed.ncbi.nlm.nih.gov\/30627878\/
[5] https:\/\/www.semanticscholar.org\/paper\/c3ae13e0c51896120885187c0d6e271fca5c6c63
[6] https:\/\/www.semanticscholar.org\/paper\/4a24a862908a57598d694499062e5d4e220b42c6
[7] https:\/\/pubmed.ncbi.nlm.nih.gov\/30826739\/
[8] https:\/\/www.semanticscholar.org\/paper\/748e64b1aca86709b53ce1aa3aae9452362caef9
[9] https:\/\/pubmed.ncbi.nlm.nih.gov\/33678617\/
[10] https:\/\/pubmed.ncbi.nlm.nih.gov\/30592118\/
[11] https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC10817245\/
[12] https:\/\/www.semanticscholar.org\/paper\/f0dcc68a96674e21cfa620fcde3e438607646742
[13] https:\/\/www.semanticscholar.org\/paper\/911897dd5deb36d094e62086a5fd5a50f1bec356
[14] https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC10137654\/
[15] https:\/\/www.semanticscholar.org\/paper\/5573638a1ac9de73a37fb07b0fb30296aafa2083
[16] https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC8921281\/
[17] https:\/\/pubmed.ncbi.nlm.nih.gov\/36995471\/
[18] https:\/\/pubmed.ncbi.nlm.nih.gov\/37688998\/
[19] https:\/\/pubmed.ncbi.nlm.nih.gov\/36717160\/
[20] https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC8968958\/<\/p>\n","protected":false},"excerpt":{"rendered":"
Foreign Accent Syndrome (FAS) is an uncommon speech disorder where individuals develop a new, seemingly foreign accent in their native language. This review explores FAS within the contexts of functional neurological disorders (FND) and mild traumatic brain injuries (mTBIs).<\/p>\n
In FNDs, FAS is often classified as a functional speech disorder, where no definitive structural brain lesions or neurological causes are identified. Cases suggest a psychogenic or functional origin, possibly triggered by psychological stress. Studies highlight that FAS in FNDs features inconsistencies and intermittency in speech patterns, which can occur even in the presence of structural brain damage.<\/p>\n
In mTBIs, FAS can emerge without significant structural lesions visible on imaging. Reports indicate that even minor head injuries might lead to FAS, with functional or metabolic brain changes undetected by standard imaging techniques. For instance, abnormal functions in specific brain regions, such as the left dorsolateral inferior frontal gyrus and caudate nucleus, have been implicated.<\/p>\n
Overall, the occurrence of FAS in both FNDs and post-mTBI contexts underscores the complexity of this speech disorder and the need for integrated diagnostic and therapeutic approaches. The studies reviewed suggest that functional and metabolic assessments, alongside behavioural interventions, are crucial for understanding and managing FAS effectively.<\/p>\n","protected":false},"author":2,"featured_media":1773,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[153,15],"tags":[194,151,195,19],"class_list":["post-1889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-functional-neurological-disorders","category-traumatic-brain-injury","tag-fas","tag-fnd","tag-foreign-accent-syndrome","tag-mtbi"],"yoast_head":"\n