期刊
NEURON
卷 72, 期 2, 页码 397-403出版社
CELL PRESS
DOI: 10.1016/j.neuron.2011.09.014
关键词
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资金
- NIH [NIDCD R03 DC010878, NINDS R01 NS050915, NIA P01 AG019724, NIA P50 AG023501]
- Fonds de la recherche en sante du Quebec (FRSQ)
- State of California [DHS 04-35516]
- Alzheimer's Disease Research Center of California [03-75271 DHS/ADP/ARCC]
- Larry L. Hillblom Foundation
- John Douglas French Alzheimer's Foundation
- Koret Family Foundation
- McBean Family Foundation
Frontal and temporal language areas involved in syntactic processing are connected by several dorsal and ventral tracts, but the functional roles of the different tracts are not well understood. To identify which white matter tract(s) are important for syntactic processing, we examined the relationship between white matter damage and syntactic deficits in patients with primary progressive aphasia, using multimodal neuroimaging and neurolinguistic assessment. Diffusion tensor imaging showed that microstructural damage to left hemisphere dorsal tracts-the superior longitudinal fasciculus including its arcuate component-was strongly associated with deficits in comprehension and production of syntax. Damage to these dorsal tracts predicted syntactic deficits after gray matter atrophy was taken into account, and fMRI confirmed that these tracts connect regions modulated by syntactic processing. In contrast, damage to ventral tracts-the extreme capsule fiber system or the uncinate fasciculus-was not associated with syntactic deficits. Our findings show that syntactic processing depends primarily on dorsal language tracts.
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