Neuroscience 2002 Abstract
| Presentation Number: | 279.11 |
|---|---|
| Abstract Title: | The neural substrates of language production in late bilinguals:A functional magnetic resonance imaging study. |
| Authors: |
Behensky, C. K.*1
; Polk, T. A.1
; Pond, H.1
; Shatz, M.1
; Zhang, J.1
; Frisch, S. A.2
1Dept of Psychology, Univ of Michigan, Ann Arbor, MI 2Communication Sceicne and Disorders, Univ of South Florida, Tampa, FL |
| Primary Theme and Topics |
Cognition and Behavior - Human Cognition and Behavior -- Language |
| Session: |
279. Human cognition and behavior: language II Poster |
| Presentation Time: | Monday, November 4, 2002 10:00 AM-11:00 AM |
| Location: | Hall A2-B3 N-8 |
| Keywords: | LATERALIZATION, SPEECH |
Are different languages anatomically segregated in the brains of some proficient bilinguals? Behavioral and neuropsychological studies of this question have produced conflicting results. One early functional magnetic resonance imaging (fMRI) study [Kim et al., 1997, Nature 388:171] reported significant segregation between languages in Broca's area when late bilinguals performed an open-ended language production task. Subsequent fMRI studies, utilizing more state-of-the-art methods, have failed to find evidence of such segregation, but these studies also used more constrained linguistic tasks (typically comprehension tasks). We report the results of an fMRI experiment utilizing Kim et al.'s (1997) silent production task, but using state-of-the-art methods. Eight right-handed, proficient, late bilinguals participated in three conditions during a blocked, fMRI experiment: (1) silent, open-ended production in their first language (L1), (2) silent, open-ended production in their second language (L2), and (3) fixation (baseline). We failed to observe the kind of segregation reported by Kim et al. Areas activated by one language were typically a subset of those activated by the other language. We did, however, find differences in the degree to which each language was lateralized. L1 production was significantly more lateralized to the left hemisphere than was L2 production.
Supported by Research grant R01-DC04205 from the National Institutes of Health
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2002 Neuroscience Meeting Planner. Orlando, FL: Society for Neuroscience, 2002. Online.
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