a Center for Vital Longevity and School of Behavioral and Brain Sciences , University of Texas at Dallas , Dallas , USA.
Cogn Neurosci. 2013;4(2):73-80. doi: 10.1080/17588928.2012.759098. Epub 2013 Jan 15.
In the present fMRI study, we aimed to assess whether spatial encoding is mediated by spatial attention. During encoding, participants were presented with abstract shapes to the left or right of fixation. During retrieval, old and new shapes were presented at fixation and participants classified each shape as "old-left", "old-right", or "new". Subsequently remembered items were assumed to have been attended during encoding, while subsequently forgotten items were assumed to have been unattended during encoding. Mirroring classic spatial attention contralateral extrastriate effects, contralateral subsequent memory effects were observed in extrastriate cortical regions BA18 and BA19 (e.g., encoding-left-hits>encoding-left-misses activated the right extrastriate cortex). An additional individual-trial modeling procedure revealed that 79.35% and 100% of accurately encoded items in the left hemisphere and the right hemisphere, respectively, reflected spatial processing. These results suggest that spatial encoding is largely, but not completely, mediated by spatial attention.
在本 fMRI 研究中，我们旨在评估空间编码是否由空间注意介导。在编码期间，参与者会看到固定点左侧或右侧的抽象形状。在检索期间，旧的和新的形状会出现在固定点上，参与者会将每个形状分类为“旧左”、“旧右”或“新”。随后被记住的项目被假设在编码期间被注意到，而随后被遗忘的项目被假设在编码期间未被注意到。镜像经典的空间注意对侧外纹状体效应，在外侧纹状体皮层区域 BA18 和 BA19 中观察到对侧随后记忆效应（例如，编码左侧命中>编码左侧错误激活右侧外纹状体皮层）。一项额外的单次试验建模程序显示，79.35%和 100%的在左半球和右半球中准确编码的项目分别反映了空间处理。这些结果表明，空间编码在很大程度上，但不是完全，由空间注意介导。
