Is it mine? Hemispheric asymmetries in corporeal self-recognition
Is it mine? Hemispheric asymmetries in corporeal self-recognition
复制标题
DOI：
10.1162/jocn.2008.20067
复制
发表时间：
2008-08-01
影响因子：
3.2
通讯作者：
Avanzi, Stefano
中科院分区：
文献类型：
--
作者：
Frassinetti, Francesca;Mainil, Manule;Avanzi, Stefano
本研究的目的是探讨“自我身体部位”的识别是否独立于对他人身体部位的识别。如果是这样的话，在涉及特定脑区的损伤后，识别“自身身体部位”的能力应该会被选择性地削弱。为了验证这一假设，在两个实验中，右半球（右脑损伤[RBD]）或左半球（左脑损伤[LBD]）病变的患者和健康受试者被提交给视觉匹配到样本的任务。在第一个实验中，刺激描绘了自己的身体部位或其他人的身体部位。在第二个实验中，刺激描绘了三个类别的部分：物体，身体和面孔。在这两个实验中，参与者被要求决定两个垂直对齐的图像（上面或下面的一个）中的哪一个与中央目标刺激相匹配。结果表明，该任务间接地利用了身体自我处理机制，即LBD患者和正常受试者在视觉上与自己的身体部位相匹配时更好地执行任务。相比之下，RBD患者没有表现出这样的优势，为自己的身体部位。此外，他们比LBD患者和正常受试者在视觉上匹配自己的身体部位时更受损，而这种差异在与其他人的身体部位执行任务时并不明显。RBD患者对其他刺激类别（面部，身体，物体）的表现，虽然比LBD患者和正常受试者的表现差，但在类别之间是相当的。这些发现表明，右半球可能通过额顶叶网络参与对自我身体部位的识别。
The aim of this study was to investigate whether the recognition of "self body parts" is independent from the recognition of other people's body parts. if this is the case, the ability to recognize "self body parts" should be selectively impaired after lesion involving specific brain areas. To verify this hypothesis, patients with lesion of the right (right brain-damaged [RBD]) or left (left brain-damaged [LBD]) hemisphere and healthy subjects were submitted to a visual matching-to-sample task in two experiments. In the first experiment, stimuli depicted their own body parts or other people's body parts. In the second experiment, stimuli depicted parts of three categories: objects, bodies, and faces. In both experiments, participants were required to decide which of two vertically aligned images (the upper or the lower one) matched the central target stimulus. The results showed that the task indirectly tapped into bodily self-processing mechanisms, in, that both LBD patients and normal Subjects performed the task better when they visually matched their own, as compared to others', body parts. In contrast, RBD patients did not show such an advantage for self body parts. Moreover, they were more impaired than LBD patients and normal subjects when visually matching their own body parts, whereas this difference was not evident in performing the task with other people's body parts. RBD patients' performance for the other stimulus categories (face, body, object), although worse than LBD patients' and normal subjects' performance, was comparable across categories. These findings suggest that the right hemisphere may be involved in the recognition of self body,parts, through a fronto-parietal network.