Chedid Georges, Wilson Maximiliano A, Provost Jean-Sebastien, Joubert Sven, Rouleau Isabelle, Brambati Simona M
Centre de Recherche de l'Institut Universitaire Gériatrique de MontréalMontréal, QC, Canada; Department of Psychology, Université de MontréalMontréal, QC, Canada.
Centre de Recherche de l'Institut Universitaire en Santé Mentale de Québec Québec, QC, Canada.
Front Psychol. 2016 Aug 30;7:1333. doi: 10.3389/fpsyg.2016.01333. eCollection 2016.
The ability to recognize a famous person occurs through semantic memory. Previous neuroimaging studies have shown that the anterior temporal lobes (ATLs) are involved in the recognition of famous people. However, it is still a matter of debate whether the semantic processing of names or pictures of famous people has an impact on the activation of ATLs. The aim of this study was to explore the pattern of activation associated with a semantic processing of famous people based on face and written name stimuli. Fifteen healthy young individuals participated in our fMRI study, in which they were asked to perform a semantic categorization judgment task, based on profession, of visually presented pictures, and names of famous people. Neuroimaging findings showed a common pattern of activation for faces and names mainly involving the inferior frontal regions, the posterior temporal lobe, the visual cortex, and the ATLs. We found that the comparison names vs. pictures lead to significant activation in the anterior superior temporal gyrus. On the other hand, faces vs. names seemed associated with increased activation in the medial ATL. Moreover, our results demonstrated that the functional connectivity network anchored to the medial ATL, compared to the anterior STG, is more connected to the bilateral occipital lobe and fusiform gyrus that are regions implicated in the visual system and visual processing of faces. This study provides critical evidence of the differential involvement of ATL regions in semantics of famous people.
识别名人的能力是通过语义记忆实现的。先前的神经影像学研究表明，颞叶前部（ATL）参与名人识别。然而，名人名字或图片的语义处理是否会影响ATL的激活，这仍是一个有争议的问题。本研究的目的是基于面部和姓名文字刺激，探索与名人语义处理相关的激活模式。15名健康的年轻个体参与了我们的功能磁共振成像（fMRI）研究，在该研究中，他们被要求根据职业对视觉呈现的名人图片和名字进行语义分类判断任务。神经影像学研究结果显示，面部和名字的激活模式具有共性，主要涉及额下回区域、颞叶后部、视觉皮层和ATL。我们发现，名字与图片的对比导致颞上回前部显著激活。另一方面，面部与名字的对比似乎与内侧ATL的激活增加有关。此外，我们的结果表明，与颞上回前部相比，以内侧ATL为中心的功能连接网络与双侧枕叶和梭状回的连接更强，而双侧枕叶和梭状回是视觉系统和面部视觉处理相关的区域。这项研究为ATL区域在名人语义学中的不同参与提供了关键证据。
