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首頁> 美國衛(wèi)生研究院文獻>The Journal of Neuroscience >Left Hemisphere Lateralization for Language in Right-Handers Is Controlled in Part by Familial Sinistrality Manual Preference Strength and Head Size
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Left Hemisphere Lateralization for Language in Right-Handers Is Controlled in Part by Familial Sinistrality Manual Preference Strength and Head Size

機譯:右撇子語言的左半球橫向化在一定程度上受家族的信度手動偏好強度和頭部大小的控制

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摘要

We investigated the effects of familial sinistrality (FS+; presence of left-handedness in one's close relatives), manual preference strength (MPS), and head size on the hemispheric lateralization of language in right-handers. Functional magnetic resonance imaging was used to map 49 individuals while listening to a story in their mother tongue. We found that individuals who had both the FS+ trait and weak MPS had no left hemisphere dominance for this lexicosyntactic task, whereas others showed a leftward functional asymmetry. In addition, the smaller the brain size, the smaller the leftward asymmetry for language, independent of FS and MPS. None of these effects were observed when the same subjects performed a spatial attention task that elicited right hemispheric functional asymmetry. These results demonstrate that the left hemisphere dominance for language in right-handers is a variable controlled, in part, by a number of specific factors, including FS, MPS, and head size.
機譯:我們調(diào)查了家族性犯罪(FS +;近親中有左撇子的存在),手動偏愛強度(MPS)和頭部大小對右撇子語言半球偏側化的影響。功能磁共振成像用于繪制49個人的地圖,同時以他們的母語聽故事。我們發(fā)現(xiàn)同時具有FS +特征和弱MPS的個人沒有左半球優(yōu)勢來完成這項詞匯句法任務,而其他人則表現(xiàn)出向左功能不對稱。另外,獨立于FS和MPS的大腦越小,語言向左的不對稱性就越小。當同一對象執(zhí)行引起右半球功能不對稱的空間注意力任務時,沒有觀察到這些影響。這些結果表明,右撇子在語言中的左半球優(yōu)勢是部分受許多特定因素控制的變量,包括FS,MPS和頭部尺寸。

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