Lexicality Drives Audio-Motor Transformations in Broca's Area

Autor/inn/en	Kotz, S. A.; D'Ausilio, A.; Raettig, T.; Begliomini, C.; Craighero, L.; Fabbri-Destro, M.; Zingales, C.; Haggard, P.; Fadiga, L.
Titel	Lexicality Drives Audio-Motor Transformations in Broca's Area
Quelle	In: Brain and Language, 112 (2010) 1, S.3-11 (9 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0093-934X
DOI	10.1016/j.bandl.2009.07.008
Schlagwörter	Speech; Brain Hemisphere Functions; Cognitive Processes; Diagnostic Tests; Cognitive Mapping; Psychomotor Skills; Phonology; Rhyme; Cues; Role + Suchen Sie Ihr Suchwort? Speaking; Sprechen; Cognitive process; Kognitiver Prozess; Diagnostic test; Diagnostischer Test; Psychomotorische Aktivität; Fonologie; Reim; Stichwort; Rollen
Abstract	Broca's area is classically associated with speech production. Recently, Broca's area has also been implicated in speech perception and non-linguistic information processing. With respect to the latter function, Broca's area is considered to be a central area in a network constituting the human mirror system, which maps observed or heard actions onto motor programs to execute analogous actions. These mechanisms share some similarities with Liberman's motor theory, where objects of speech perception correspond to listener's intended articulatory gestures. The aim of the current series of behavioral, TMS and fMRI studies was to test if Broca's area is indeed implicated in such audio-motor transformations. More specifically, using a classical phonological rhyme priming paradigm, we investigated whether the role of Broca's area could be purely phonological or rather, is lexical in nature. In the behavioral baseline study, we found a large priming effect in word prime/target pairs (W-W) and no effect for pseudo-words (PW-PW). Online TMS interference of Broca's area canceled the priming difference between W-W and PW-PW by enhancing the effects for PW-PW. Finally, the fMRI study showed activation of Broca's area for W-W pairs, but not for PW-PW pairs. Our data show that Broca's area plays a significant role in speech perception strongly linked to the lexicality of a stimulus. (Contains 4 tables and 3 figures.) (As Provided).
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Update	2017/4/10