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  Auditory processing of different types of pseudo-words: An event-related fMRI study

Raettig, T., & Kotz, S. A. (2007). Auditory processing of different types of pseudo-words: An event-related fMRI study. Poster presented at 2007 Annual Meeting of the Cognitive Neuroscience Society (CNS), New York, NY, USA.

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 Urheber:
Raettig, Tim1, Autor           
Kotz, Sonja A.1, 2, Autor           
Affiliations:
1Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              
2Minerva Research Group Neurocognition of Rhythm in Communication, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634560              

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 Zusammenfassung: Imaging results on real word and pseudo-word processing have been heterogeneous, allowing only cautious claims about the neuroanatomical loci of lexico-semantic processing. In order to shed more light on this issue, we examined the impact of different structures of non-lexical stimuli on the outcome of comparisons between such items and matched real words. We anticipated that the degree to which a pseudo-word still resembles a particular real word template determines how word-like it is processed. To verify this idea, we tested different types of pseudo-words (either phonotactically legal and transparently or opaquely derived from real words or phonotactically illegal) in an event-related fMRI paradigm utilizing a lexical decision task. All types of pseudo-words elicited a stronger hemodynamic brain response than real words in the bilateral superior temporal gyri. Real words produced stronger brain activations than pseudo-words in the left posterior middle temporal and angular gyri, the rostral and caudal cingulate gyrus, the precuneus and the right inferior temporal gyrus. When contrasted to opaque pseudo-words transparent pseudo-words elicited a stronger brain response in a temporo-parietal region adjacent to the one observed for real words. Our results provide further evidence for the involvement of the left posterior middle temporal and angular gyri in lexical-semantic processing. The data also indicate that transparently derived pseudo-words are processed similarly to real words. In contrast, semantic operations are blocked when opaquely derived pseudo-words are processed.

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Sprache(n): eng - English
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 Publikationsstatus: Keine Angabe
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 Identifikatoren: eDoc: 391765
Anderer: R2226
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Titel: 2007 Annual Meeting of the Cognitive Neuroscience Society (CNS)
Veranstaltungsort: New York, NY, USA
Start-/Enddatum: 2007-05-05 - 2007-05-08

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