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功能磁共振成像揭示精神分裂症患者梭状回面孔区功能保存

Preserved function of the fusiform face area in schizophrenia as revealed by fMRI.

作者信息

Yoon Jong H, D'Esposito Mark, Carter Cameron S

机构信息

University of California Davis Imaging Research Center, Department of Psychiatry and Behavioral Sciences, University of California Davis, 4701 X St., Sacramento, CA 95817, USA.

出版信息

Psychiatry Res. 2006 Dec 1;148(2-3):205-16. doi: 10.1016/j.pscychresns.2006.06.002. Epub 2006 Nov 7.

Abstract

Many lines of evidence suggest that individuals with schizophrenia suffer from face processing deficits. However, the specificity of these deficits and the neural dysfunction underlying them remain unclear. To address these questions, we evaluated the functional status of a critical region for face processing, the fusiform face area (FFA), in subjects with schizophrenia. Fourteen schizophrenia patients and 10 healthy control subjects participated in an fMRI experiment to determine the functional status of the FFA by viewing a series of faces and exemplars of other object categories, while completing a low-level task designed to verify their engagement with the stimuli. Behavioral performance and activation of the FFA were equivalent between groups. Thirteen of 14 patients and all control subjects displayed FFA activation. Furthermore, the degree of FFA activation, as measured by FFA volume and magnitude of activity, was similar between groups. The FFA, a critical region in the neural system subserving the perceptual processing of faces, appears to be intact in schizophrenia. These results call into question the presence of a specific face processing deficit in schizophrenia.

摘要

许多证据表明,精神分裂症患者存在面部处理缺陷。然而,这些缺陷的特异性及其潜在的神经功能障碍仍不清楚。为了解决这些问题,我们评估了精神分裂症患者面部处理关键区域——梭状回面孔区(FFA)的功能状态。14名精神分裂症患者和10名健康对照者参与了一项功能磁共振成像(fMRI)实验,通过观看一系列面孔和其他物体类别的范例来确定FFA的功能状态,同时完成一项旨在验证他们对刺激参与度的低水平任务。两组之间的行为表现和FFA激活情况相当。14名患者中的13名以及所有对照者均表现出FFA激活。此外,通过FFA体积和活动强度测量的FFA激活程度在两组之间相似。FFA是神经系统中负责面部感知处理的关键区域,在精神分裂症中似乎是完整的。这些结果对精神分裂症中存在特定面部处理缺陷的观点提出了质疑。

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