Neurocognitive mechanism of human body form perception

本研究计划的目的是继续研究身体和面孔以不同方式处理的机制。在第一个资助期内，我们进行了5项研究。在三项研究中，我们提出了一个问题，即身体是否被整体处理。结果表明，与身体相比，面部的整体处理更为明显（索里亚鲍泽，苏坎和道姆，2011）。此外，我们可以表明，这些过程是反映了所谓的P200脑电图组成部分（索里亚鲍泽，Schwierer和苏坎，修订中）。第三次fMRI研究的初步结果表明，整体信息是在面孔敏感区加工的，我们可以进一步表明，面部一阶信息的加工对身体加工是重要的。这些信息是N170 EEG分量的时间范围内的过程（索里亚鲍泽和苏坎，2013）。在进一步的功能磁共振成像研究中，我们调查了大脑皮层区域中的一阶信息处理。结果表明，与身体相关的一阶脑信息主要由枕中回、舌回和枕叶回加工。相比之下，前扣带皮层和楔叶特别参与面孔处理。在第二个资助期，我们想研究面孔敏感和身体敏感网络是如何相互作用的。此外，我们将研究哪些机制与身体的感知有关。一个特别的重点将被设置在相似的身体和面孔的处理在文献中描述到目前为止，提出了一个特定的角色的位置的head.On这些发现的基础上，我们想解决以下问题：（1）之间的有效连接的初级视觉皮层和重叠的代表FFA和FBA调制的头部的可见性（研究1）？(2)FFA和OFA之间以及FBA和EBA之间的功能连接是否可以根据种子区域进行调节，以处理没有头部的身体（研究2）？(3)与面孔相比，身体的一阶信息和结构信息对身体的处理是否更重要？整体性和结构性二阶信息是否可能对面孔加工负责（研究3和4）？(4)我们的研究结果符合以下假设：头部在身体加工中的相关性与眼睛相关信息在面部加工中的相关性相当（研究3和4）。

The goal of this research proposal is to continue the work on investigating the mechanism in which bodies and faces are processed in a different way.During the first funding period, we conducted 5 studies. In three studies we asked the question if bodies are processed holistically. Results suggest that holistic processing is more pronounced in faces if compared to bodies (Soria Bauser, Suchan & Daum, 2011). Additionally we could show that these processes are reflected by the so called P200 EEG component (Soria Bauser, Schwierer & Suchan, under revision). First results of a third fMRI study on this topic suggest that holistic information are processed in face-sensitive areas.We could further show, that processing of configural first order information are important for body processing. These information are processes within the time range of the N170 EEG component (Soria Bauser & Suchan, 2013). In a further fMRI study we investigated in which cortical areas of the brain configural first order information are processed. Results suggest that body related first order configural information are processed in the middle occipital gyrus, the lingual gyrus. In contrast, the anterior cingulate cortex and the cuneus were especially involved in face processing.For the second funding period we would like to investigate in which way the face-sensitive and body sensitive networks interact. Additionally we will investigate which mechanisms are relevant for the perception of bodies. A special focus will be set on the similarities in the processing of bodies and faces described in the literature so far suggesting a specific role of the position of the head.On the basis of these finding we would like to address the following questions:(1) can the effective connectivity between the primary visual cortex and the overlapping representation of the FFA and FBA be modulated by the visibility of the head (study 1)? (2) can the functional connectivity, depending on the seed region, between FFA and OFA and between FBA and EBA be modulated for the processing of bodies without a head (study 2)? (3) are configural first order information as well as structural information more important for the processing of bodies if compared to faces? Are holistic and configural second order information possible responsible for face processing (study 3 and 4)?(4) our results are in line with the following hypothesis: the relevance of the head in body processing is comparable with the relevance of eye related information for face processing (study 3 and 4).