Engagement of fusiform cortex and disengagement of lateral occipital cortex in the acquisition of radiological expertise.
Engagement of fusiform cortex and disengagement of lateral occipital cortex in the acquisition of radiological expertise.
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DOI：
10.1093/cercor/bhp051
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发表时间：
2009-11
期刊：
影响因子：
--
通讯作者：
Engel SA
中科院分区：
文献类型：
--
作者：
Harley EM;Pope WB;Villablanca JP;Mumford J;Suh R;Mazziotta JC;Enzmann D;Engel SA
人类的视觉通路专门用于物体识别，从外侧枕叶皮层（LO）延伸到颞叶的腹侧表面，包括梭状回。这些通路的可塑性支持视觉专业知识的获得，但确切地说，训练如何影响不同的区域仍不清楚。我们使用功能性磁共振成像来测量放射科医生在胸部X光片中发现异常时LO和梭状回的神经活动。右侧梭状面区（FFA）的活动与视觉专业知识相关，在扫描过程中测量行为表现。与此相反，活动在左LO负相关的专业知识，和量的LO，对射线照片的专家比新手小。在FFA和LO活动呈负相关的专家，而在新手，这两个地区没有表现出稳定的关系。总之，这些结果表明，FFA变得更加参与，而LO在培训过程中较少参与解释放射学图像。实现专家级的视觉表现可能涉及抑制现有的神经表征，同时发展其他神经表征。
The human visual pathways that are specialized for object recognition stretch from lateral occipital cortex (LO) to the ventral surface of the temporal lobe, including the fusiform gyrus. Plasticity in these pathways supports the acquisition of visual expertise, but precisely how training affects the different regions remains unclear. We used functional magnetic resonance imaging to measure neural activity in both LO and the fusiform gyrus in radiologists as they detected abnormalities in chest radiographs. Activity in the right fusiform face area (FFA) correlated with visual expertise, measured as behavioral performance during scanning. In contrast, activity in left LO correlated negatively with expertise, and the amount of LO that responded to radiographs was smaller in experts than in novices. Activity in the FFA and LO correlated negatively in experts, whereas in novices, the 2 regions showed no stable relationship. Together, these results suggest that the FFA becomes more engaged and left LO less engaged in interpreting radiographic images over the course of training. Achieving expert visual performance may involve suppressing existing neural representations while simultaneously developing others.
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