Invariance of Functional Characteristics to Task Difference at Low-Level and High-Level Areas in the Ventral Visual Pathway
Invariance of Functional Characteristics to Task Difference at Low-Level and High-Level Areas in the Ventral Visual Pathway作者机构：Kansei Fukushi Research Institute Tohoku Fukushi University Sendai Japan Neuroscience Research Institute Gachon University Incheon Korea
出 版 物：《Journal of Behavioral and Brain Science》 (行为与脑科学期刊（英文）)
年 卷 期：2014年第4卷第9期
页 面：402-411页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Task Difference Repetition Suppression FFA Central Stimulation Peripheral Stimulation fMRI Face Images
摘 要：Tasks with stimuli are often used for the examination of stimulus-related functional characteristics of brain areas. However, the task can affect the response to a stimulus. Repetition suppression is a phenomenon that can be used to probe neuronal properties using macroscale functional magnetic resonance imaging (fMRI). The use of repetition suppression as an investigative tool to assess functional characteristics warrants the investigation of the invariance of repetition suppression to a given task. In this study, we examined repetition suppression using images of faces during different tasks. We found that the task difference did not change the response patterns related to repetition suppression in high-level areas and the primary visual area while it changed amplitudes of fMRI response to the visual stimuli. The result suggests that the repetition-suppression phenomenon is robust compared with the amplitude of fMRI response, and functional characteristics can be examined using the repetition-suppression phenomenon even under the condition that fMRI response is varied by task difference.
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