| Electrophysiological evidence of functional integration between the language and motor systems in the brain: a study of the speech Bereitschaftspotential. | |
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MedLine Citation:
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PMID: 19109058 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: We investigated whether the Bereitschaftspotential (BP), an event related potential believed to reflect motor planning, would be modulated by language-related parameters prior to speech. We anticipated that articulatory complexity would produce effects on the BP distribution similar to those demonstrated for complex limb movements. We also hypothesized that lexical semantic operations would independently impact the BP. METHODS: Eighteen participants performed 3 speech tasks designed to differentiate lexical semantic and articulatory contributions to the BP. EEG epochs were time-locked to the earliest source of speech movement per trial. Lip movements were assessed using EMG recordings. Doppler imaging was used to determine the onset of tongue movement during speech, providing a means of identification and elimination of potential artifact. RESULTS: Compared to simple repetition, complex articulations produced an anterior shift in the maximum midline BP. Tasks requiring lexical search and selection augmented these effects and independently elicited a left lateralized asymmetry in the frontal distribution. CONCLUSIONS: The findings indicate that the BP is significantly modulated by linguistic processing, suggesting that the premotor system might play a role in lexical access. SIGNIFICANCE: These novel findings support the notion that the motor systems may play a significant role in the formulation of language. |
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Authors:
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J J McArdle; Z Mari; R H Pursley; G M Schulz; A R Braun |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Intramural Date: 2008-12-23 |
Journal Detail:
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Title: Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology Volume: 120 ISSN: 1872-8952 ISO Abbreviation: Clin Neurophysiol Publication Date: 2009 Feb |
Date Detail:
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Created Date: 2009-02-09 Completed Date: 2009-04-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100883319 Medline TA: Clin Neurophysiol Country: Netherlands |
Other Details:
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Languages: eng Pagination: 275-84 Citation Subset: IM |
Affiliation:
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Language Section, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Building 10, Room 5C310, Bethesda, MD 20892, USA. mcardle@nidcd.nih.gov |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation
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methods Adolescent Adult Analysis of Variance Brain / physiology* Brain Mapping* Contingent Negative Variation / physiology* Electroencephalography / methods Electromyography Female Functional Laterality / physiology Humans Language* Male Movement / physiology* Psychomotor Performance / physiology Reaction Time Reading Speech / physiology* Speech Acoustics Speech Production Measurement Tongue / physiology Young Adult |
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