An EMG Study of the Lip Muscles during Covert Auditory Verbal Hallucinations in Schizophrenia

Autor/inn/en	Rapin, Lucile; Dohen, Marion; Polosan, Mircea; Perrier, Pascal; Loevenbruck, Hélène
Titel	An EMG Study of the Lip Muscles during Covert Auditory Verbal Hallucinations in Schizophrenia
Quelle	In: Journal of Speech, Language, and Hearing Research, 56 (2013) 6, (12 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/1092-4388(2013/12-0210)
Schlagwörter	Schizophrenia; Human Body; Auditory Perception; Motor Reactions; Perceptual Impairments; Predictor Variables; Inner Speech (Subvocal); Patients; Articulation Impairments + Suchen Sie Ihr Suchwort? Schizophrenie; Menschlicher Körper; Auditive Wahrnehmung; Akustische Wahrnehmung; Akustik; Perceptual handicaps; Wahrnehmungsstörung; Prädiktor; Inneres Sprechen; Patient; Artikulationsstörung
Abstract	Purpose: "Auditory verbal hallucinations" (AVHs) are speech perceptions in the absence of external stimulation. According to an influential theoretical account of AVHs in schizophrenia, a deficit in inner-speech monitoring may cause the patients' verbal thoughts to be perceived as external voices. The account is based on a predictive control model, in which individuals implement verbal self-monitoring. The authors examined lip muscle activity during AVHs in patients with schizophrenia to check whether inner speech occurred. Method: Lip muscle activity was recorded during covert AVHs (without articulation) and rest. Surface electromyography (EMG) was used on 11 patients with schizophrenia. Results: Results showed an increase in EMG activity in the orbicularis oris inferior muscle during covert AVHs relative to rest. This increase was not due to general muscular tension because there was no increase of muscular activity in the forearm muscle. Conclusion: This evidence that AVHs might be self-generated inner speech is discussed in the framework of a predictive control model. Further work is needed to better describe how inner speech is controlled and monitored and the nature of inner-speech-monitoring-dysfunction. This will lead to a better understanding of how AVHs occur. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10