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Titolo:
Neural systems for sentence processing in stuttering
Autore:
Weber-Fox, C;
Indirizzi:
Purdue Univ, Dept Audiol & Speech Sci, W Lafayette, IN 47907 USA Purdue Univ W Lafayette IN USA 47907 peech Sci, W Lafayette, IN 47907 USA
Titolo Testata:
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH
fascicolo: 4, volume: 44, anno: 2001,
pagine: 814 - 825
SICI:
1092-4388(200108)44:4<814:NSFSPI>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; BRAIN POTENTIALS; SYNTACTIC COMPLEXITY; BEHAVIORAL EVIDENCE; INITIAL STATUS; LANGUAGE; ADULTS; CHILDREN; SPEECH; LENGTH;
Keywords:
stuttering; event-related brain potentials; language processing; lexical access;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Weber-Fox, C Purdue Univ, Dept Audiol & Speech Sci, Heavilon Hall,B1353, WLafayette, IN 47907 USA Purdue Univ Heavilon Hall,B1353 W Lafayette IN USA47907 USA
Citazione:
C. Weber-Fox, "Neural systems for sentence processing in stuttering", J SPEECH L, 44(4), 2001, pp. 814-825

Abstract

The role of neurolinguistic factors in stuttering was investigated by determining whether individuals who stutter display atypical neural functions for language processing, even with no speech production demands. Event-related brain potentials (ERPs) were obtained while 9 individuals who stutter (IWS) and 9 normally fluent speakers (NS) read sentences silently. The ERPs were elicited by: (a) closed-class words that provide structural or grammatical information, (b) open-class words that convey referential meaning, and (c) semantic anomalies (violations in semantic expectation). In standardized tests, adult IWS displayed similar grammatical and lexical abilities in both comprehension and production tasks compared to their matched, normally fluent peers. Yet the ERPs elicited in IWS for linguistic processing tasks revealed differences in functional brain organization. The ERPs elicited inIWS were characterized by reduced negative amplitudes for closed-class words (N280), open-class words (N350), and semantic anomalies (N400) in a temporal window of approximately 200-450 after word onsets. The overall patternof results indicates that alterations in processing for IWS are related toneural functions that are common to word classes and perhaps involve shared, underlying processes for lexical access.

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Documento generato il 27/01/20 alle ore 14:04:26