Bilingualism represents an interesting model of possible experience-dependent alterations in brain structure. The current study examines whether interhemispheric adaptations in brain structure are associated with bilingualism. Corpus callosum volume and cortical thickness asymmetry across 13 regions of interest (selected to include critical language and bilingual cognitive control areas) were measured in a sample of Spanish-English bilinguals and age- and gender-matched monolingual individuals (N = 39 per group). Cortical thickness asymmetry of the anterior cingulate region differed across groups, with thicker right than left cortex for bilinguals and the reverse for monolinguals. In addition, two adjacent regions of the corpus callosum (mid-anterior and central) had greater volume in bilinguals. The findings suggest that structural indices of interhemispheric organization in a critical cognitive control region are sensitive to variations in language experience.

中文翻译：

---

双语影响半球组织的结构指标

双语制代表了大脑结构中可能依赖于经验的改变的有趣模型。目前的研究检查大脑结构的半球间适应性是否与双语相关。在西班牙-英语双语者和年龄和性别匹配的单语个体样本中测量了 13 个感兴趣区域（选择包括关键语言和双语认知控制区域）的胼胝体体积和皮质厚度不对称性（每组 N = 39） . 前扣带回区域的皮质厚度不对称性因组而异，双语者右皮层比左皮层厚，单语者则相反。此外，双语者胼胝体的两个相邻区域（前中部和中部）的体积更大。