Cycowicz Yael M, Friedman David
Cognitive Electrophysiology Laboratory, New York State Psychiatric Institute, New York, New York 10032, USA.
Psychophysiology. 2003 May;40(3):455-64. doi: 10.1111/1469-8986.00047.
Remembering the context (i.e., source) in which an event occurred reveals episodic memory effects (EM) in the event-related brain potentials (ERP). In some verbal source memory experiments, a late prefrontal EM effect has been observed. In a different, pictorial source memory paradigm, a late, parieto-occipital EM effect was recorded. To assess whether these two EM effects stemmed from differences in task paradigms or from source-attribute differences, ERPs were recorded during source memory retrieval for object colors in two tasks. In the sequential task, old/new judgments were followed by source judgments (i.e., color). In the exclusion task, source memory judgments coincided with recognition judgments. For both tasks, late, parietao-occipital EM effects were observed. These findings suggest that it is not the nature of the task, but rather the perceptual characteristics of the source that lead to the presence of the parieto-occipital EM effect. The data further imply that memories for perceptual attributes such as color are stored in and retrieved from sensory-specific cortical areas.
记住事件发生的背景（即来源）会在事件相关脑电位（ERP）中揭示情景记忆效应（EM）。在一些言语来源记忆实验中，观察到了晚期前额叶EM效应。在另一种不同的、图片来源记忆范式中，记录到了晚期顶枕叶EM效应。为了评估这两种EM效应是源于任务范式的差异还是来源属性的差异，在两项任务中对物体颜色进行来源记忆检索时记录了ERP。在顺序任务中，先进行新旧判断，然后进行来源判断（即颜色）。在排除任务中，来源记忆判断与识别判断同时进行。对于这两项任务，均观察到了晚期顶枕叶EM效应。这些发现表明，导致顶枕叶EM效应出现的不是任务的性质，而是来源的感知特征。数据进一步表明，诸如颜色等感知属性的记忆存储在特定感觉皮层区域并从该区域检索。
