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Slips of the tongue in patients with Gilles de la Tourette syndrome
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Slips of the tongue in patients with Gilles de la Tourette syndrome
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Slips of the tongue in patients with Gilles de la Tourette syndrome
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Journal Article
Slips of the tongue in patients with Gilles de la Tourette syndrome
2024
Overview
Motor and vocal tics are the main symptom of Gilles de la Tourette-syndrome (GTS). A particular complex vocal tic comprises the utterance of swear words, termed coprolalia. Since taboo words are socially inappropriate, they are normally suppressed by people, which implies cognitive control processes.
To investigate the control of the unintentional pronunciation of taboo words and the associated processes of conflict monitoring, we used the \"Spoonerisms of Laboratory Induced Predisposition\" (SLIP) paradigm. Participants read multiple inductor word pairs with the same phonemes, followed by pronouncing a target pair with inverse phonemes. This led to a conflict between two competing speech plans: the correct word pair and the word pair with inverted phonemes. Latter speech error, a spoonerism, could result in a neutral or taboo word. We investigated 19 patients with GTS and 23 typically developed controls (TDC) and measured participants' electroencephalography (EEG) during the SLIP task.
At the behavioral level less taboo than neutral word spoonerisms occurred in both groups without significant differences. Event-related brain potentials (ERP) revealed a difference between taboo and neutral word conditions in the GTS group at the midline electrodes in a time range of 250-400 ms after the speech prompt, which was not found in the TDC group. The extent of this effect depended on the number of inductor word pairs, suggesting an increasing level of cognitive control in the GTS group.
The differences between taboo and neutral word conditions in patients with GTS compared to TDC suggest an altered recruitment of cognitive control processes in GTS, likely enlisted to suppress taboo words.
Publisher
Springer Nature B.V,BioMed Central,BMC
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