Behavioural relevance of atypical language lateralization in healthy subjects

被引：93

作者：

Knecht, S ^{[1
]}

Dräger, B ^{[1
]}

Flöel, A ^{[1
]}

Lohmann, H ^{[1
]}

Breitenstein, C ^{[1
]}

Deppe, M ^{[1
]}

Henningsen, H ^{[1
]}

Ringelstein, EB ^{[1
]}

机构：

[1] Univ Munster, Dept Neurol, D-48129 Munster, Germany

来源：

BRAIN | 2001年 / 124卷

关键词：

functional Doppler ultrasonography; language lateralization; neuroscience; hemispheric dominance; behaviour;

D O I：

10.1093/brain/124.8.1657

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

In most humans, language is lateralized to the left side of the brain. It has been speculated that this hemispheric specialization is a prerequisite for the full realization of linguistic potential. Using standardized questionnaires and performance measures, we attempted to determine if there are behavioural correlates of atypical, i.e. right-hemispheric and bilateral, language lateralization. The side and degree of language lateralization were determined by measuring the hemispheric perfusion differences by functional transcranial Doppler ultrasonography during a word generation task in healthy volunteers. Subjects with left (n = 264), bilateral (n = 31) or right (n = 31) hemisphere language representation did not differ significantly with respect to mastery of foreign languages, academic achievement, artistic talents, verbal fluency or (as assessed in a representative subgroup) in intelligence or speed of linguistic processing. These findings suggest that atypical hemispheric specialization for language, i.e. right-hemisphere or bilateral specialization, is not associated with major impairments of linguistic faculties in otherwise healthy subjects.

引用

页码：1657 / 1665

页数：9

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