Literaturnachweis - Detailanzeige
| Autor/inn/en | Van der Haegen, Lise; Cai, Qing; Brysbaert, Marc |
|---|---|
| Titel | Colateralization of Broca's Area and the Visual Word form Area in Left-Handers: fMRI Evidence |
| Quelle | In: Brain and Language, 122 (2012) 3, S.171-178 (8 Seiten)
PDF als Volltext |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Zeitschriftenaufsatz |
| ISSN | 0093-934X |
| DOI | 10.1016/j.bandl.2011.11.004 |
| Schlagwörter | Evidence; Word Recognition; Phonology; Handedness; Brain Hemisphere Functions; Diagnostic Tests; Reading Processes; Task Analysis; Correlation; Role; Models; Neurology; Biology; Measurement; Lateral Dominance; Speech |
| Abstract | Language production has been found to be lateralized in the left hemisphere (LH) for 95% of right-handed people and about 75% of left-handers. The prevalence of atypical right hemispheric (RH) or bilateral lateralization for reading and colateralization of production with word reading laterality has never been tested in a large sample. In this study, we scanned 57 left-handers who had previously been identified as being clearly left (N = 30), bilateral (N = 7) or clearly right (N = 20) dominant for speech on the basis of fMRI activity in the inferior frontal gyrus (pars opercularis/pars triangularis) during a silent word generation task. They were asked to perform a lexical decision task, in which words were contrasted against checkerboards, to test the lateralization of reading in the ventral occipitotemporal region. Lateralization indices for both tasks correlated significantly (r = 0.59). The majority of subjects showed most activity during lexical decision in the hemisphere that was identified as their word production dominant hemisphere. However, more than half of the sample (N = 31) had bilateral activity for the lexical decision task without a clear dominant role for either the LH or RH, and three showed a crossed frontotemporal lateralization pattern. These findings have consequences for neurobiological models relating phonological and orthographic processes, and for lateralization measurements for clinical purposes. (Contains 2 tables and 1 figure.) (As Provided). |
| Anmerkungen | Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2017/4/10 |
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