Chiarello Christine, Kacinik Natalie, Manowitz Brian, Otto Ronald, Leonard Christiana
Department of Psychology, University of California, Riverside, CA 92521, USA.
Neuropsychology. 2004 Apr;18(2):219-31. doi: 10.1037/0894-4105.18.2.219.
The current investigation tested 20 male right-handers in 5 divided visual field lexical tasks. Asymmetries in Heschl's gyrus, planum temporale, and planum parietale were measured using structural magnetic resonance imaging. Composite task asymmetries were positively correlated with asymmetry of the planum temporale only. There was also an association between the consistency of anatomical and behavioral asymmetries: Individuals who departed the most from the modal pattern of cortical asymmetry across regions also tended to show the greatest variability in asymmetry across tasks. Hence, individual differences in language laterality tasks may be affected by variation in asymmetry of posterior language structures. Additionally, when typical anatomical asymmetries fail to co-occur, there may be a less strictly regulated distribution of function across hemispheres.
当前的研究对20名惯用右手的男性进行了5项分开的视野词汇任务测试。使用结构磁共振成像测量了颞横回、颞平面和顶叶平面的不对称性。复合任务不对称性仅与颞平面的不对称性呈正相关。解剖学和行为不对称性的一致性之间也存在关联：在各个区域中偏离皮质不对称模式最多的个体，在不同任务中的不对称性变化也往往最大。因此，语言偏侧性任务中的个体差异可能会受到后语言结构不对称性变化的影响。此外，当典型的解剖学不对称性未能同时出现时，跨半球的功能分布可能会受到较不严格的调节。
