Hemispheric asymmetries in global and local processing: Evidence from fMRI
Hemispheric asymmetries in global and local processing: Evidence from fMRI
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DOI：
10.1097/00001756-199705060-00025
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发表时间：
1997-05-06
期刊：
影响因子：
1.7
通讯作者：
Stiles, J
中科院分区：
文献类型：
--
作者：
Martinez, A;Moses, P;Stiles, J
功能磁共振成像（fMRI）用于探索与视觉空间模式的整体和局部处理相关的脑基质。在左右半球的枕颞区发现了激活的系统性差异，与在视觉半球呈现条件下观察到的反应时间数据的差异一致。在右半球内，整体处理条件下的激活面积和分数信号变化大于局部处理条件。在左半球，对全局和局部输入的激活程度很高，并且具有可比性。
FUNCTIONAL magnetic resonance imaging (fMRI) was used to explore the brain substrate associated with global and local processing of visuospatial patterns. Systematic differences in activation, consistent with differences observed in reaction time data collected under conditions of visual hemifield presentation, were found in occipitotemporal regions of the right and left hemispheres. Within the right hemisphere, area of activation and fractional signal changes were greater under conditions of global processing than under local processing conditions. In the left hemisphere, activation to global and local input was high and comparable.