Brain systems mediating semantic and syntactic processing in deaf native signers: Biological invariance and modality specificity
- 26 May 2009
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences of the United States of America
- Vol. 106 (21), 8784-8789
- https://doi.org/10.1073/pnas.0809609106
Abstract
Studies of written and spoken language suggest that nonidentical brain networks support semantic and syntactic processing. Event-related brain potential (ERP) studies of spoken and written languages show that semantic anomalies elicit a posterior bilateral N400, whereas syntactic anomalies elicit a left anterior negativity, followed by a broadly distributed late positivity. The present study assessed whether these ERP indicators index the activity of language systems specific for the processing of aural-oral language or if they index neural systems underlying any natural language, including sign language. The syntax of a signed language is mediated through space. Thus the question arises of whether the comprehension of a signed language requires neural systems specific for this kind of code. Deaf native users of American Sign Language (ASL) were presented signed sentences that were either correct or that contained either a semantic or a syntactic error (1 of 2 types of verb agreement errors). ASL sentences were presented at the natural rate of signing, while the electroencephalogram was recorded. As predicted on the basis of earlier studies, an N400 was elicited by semantic violations. In addition, signed syntactic violations elicited an early frontal negativity and a later posterior positivity. Crucially, the distribution of the anterior negativity varied as a function of the type of syntactic violation, suggesting a unique involvement of spatial processing in signed syntax. Together, these findings suggest that biological constraints and experience shape the development of neural systems important for language.This publication has 51 references indexed in Scilit:
- The signing brain: the neurobiology of sign languageTrends in Cognitive Sciences, 2008
- Hand and Mouth: Cortical Correlates of Lexical Processing in British Sign Language and Speechreading EnglishJournal of Cognitive Neuroscience, 2008
- The Role of Iconic Gestures in Speech Disambiguation: ERP EvidenceJournal of Cognitive Neuroscience, 2007
- The cortical organization of audio-visual sentence comprehension: an fMRI study at 4 TeslaCognitive Brain Research, 2004
- Author and Subject IndexHormone Research, 1998
- Temporal structure of syntactic parsing: Early and late event-related brain potential effects.Journal of Experimental Psychology: Learning, Memory, and Cognition, 1996
- A comparison of lexical and sentence-level context effects in event-related potentialsLanguage and Cognitive Processes, 1993
- Visual and auditory sentence processing: A developmental analysis using event‐related brain potentialsDevelopmental Neuropsychology, 1992
- Fricative–stop coarticulation: Acoustic and perceptual evidenceThe Journal of the Acoustical Society of America, 1982
- Perceptual assessment of fricative–stop coarticulationThe Journal of the Acoustical Society of America, 1981