Right-left discrimination is related to the right hemisphere
Right-left discrimination is related to the right hemisphere
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DOI：
10.1080/13576500802114120
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发表时间：
2008-01-01
期刊：
影响因子：
1.4
通讯作者：
Janszky, Jozsef
中科院分区：
文献类型：
--
作者：
Auer, Tibor;Schwarcz, Attila;Janszky, Jozsef
我们的目的是确定功能性磁共振成像（fMRI）的功能定位的左右辨别（RLD）。在这项研究中，16名男性志愿者进行了检查。有三个任务会话：一个活动任务和两个基线任务。在基线任务期间，参与者被指示用手指显示数字。第一个基线任务用右手完成，第二个用左手完成。在主动（RLD）任务期间，参与者还被指示显示数字。基线任务和主动任务之间的区别在于，在主动任务期间，参与者应该执行指令的手是随机分配的。因此，参与者不知道在指令命令之前应该使用哪只手。在RLD期间，激活发生在右侧额回、楔前叶、中央后回、角回、舌回和上级颞回。左侧颞回和楔前叶也出现激活。76.7%的激活出现在右半球，23.3%的激活出现在左半球。总之，我们发现RLD主要与右半球有关，并且需要激活顶颞枕交界处和视觉系统，包括楔叶、楔前叶和舌回。
We aimed to determine the functional localisation of right-left discrimination (RLD) by functional MRI (fMRI). In this study, 16 male volunteers were examined. There were three task sessions: one active and two baseline tasks. During the baseline tasks participants were instructed to show numbers with their fingers. The first baseline task was performed with the right hand, the second one with the left hand. During the active (RLD) task participants were also instructed to show numbers. The difference between baseline and active tasks was that during the active task the hand with which the participant should perform the instruction was assigned randomly. Thus, participants were unaware which hand should be used before the instruction command. During RLD, activations occurred in the right-sided frontal, precuneus, postcentral, angular, lingual, and superior temporal gyri. Activations also appeared in the left-sided temporal gyri and precuneus. Of the activations, 76.7% appeared in the right hemisphere, 23.3% in the left hemisphere. Conclusively, we found that RLD is mainly related to the right hemisphere, and requires activation of the parieto-temporo-occipital junction and the visual system including cuneus, precuneus, and gyrus lingualis.