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Proceedings Paper

Face processing pattern under top-down perception: a functional MRI study
Author(s): Jun Li; Jimin Liang; Jie Tian; Jiangang Liu; Jizheng Zhao; Hui Zhang; Guangming Shi
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Paper Abstract

Although top-down perceptual process plays an important role in face processing, its neural substrate is still puzzling because the top-down stream is extracted difficultly from the activation pattern associated with contamination caused by bottom-up face perception input. In the present study, a novel paradigm of instructing participants to detect faces from pure noise images is employed, which could efficiently eliminate the interference of bottom-up face perception in topdown face processing. Analyzing the map of functional connectivity with right FFA analyzed by conventional Pearson's correlation, a possible face processing pattern induced by top-down perception can be obtained. Apart from the brain areas of bilateral fusiform gyrus (FG), left inferior occipital gyrus (IOG) and left superior temporal sulcus (STS), which are consistent with a core system in the distributed cortical network for face perception, activation induced by top-down face processing is also found in these regions that include the anterior cingulate gyrus (ACC), right oribitofrontal cortex (OFC), left precuneus, right parahippocampal cortex, left dorsolateral prefrontal cortex (DLPFC), right frontal pole, bilateral premotor cortex, left inferior parietal cortex and bilateral thalamus. The results indicate that making-decision, attention, episodic memory retrieving and contextual associative processing network cooperate with general face processing regions to process face information under top-down perception.

Paper Details

Date Published: 27 February 2009
PDF: 10 pages
Proc. SPIE 7262, Medical Imaging 2009: Biomedical Applications in Molecular, Structural, and Functional Imaging, 72621U (27 February 2009); doi: 10.1117/12.811324
Show Author Affiliations
Jun Li, Xidian Univ. (China)
Jimin Liang, Xidian Univ. (China)
Jie Tian, Institute of Automation (China)
Xidian Univ. (China)
Jiangang Liu, Beijing Jiaotong Univ. (China)
Jizheng Zhao, Xidian Univ. (China)
Hui Zhang, Institute of Automation (China)
Guangming Shi, Xidian Univ. (China)

Published in SPIE Proceedings Vol. 7262:
Medical Imaging 2009: Biomedical Applications in Molecular, Structural, and Functional Imaging
Xiaoping P. Hu; Anne V. Clough, Editor(s)

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