Smith Ryan M, Beversdorf David Q
Neuroscience Graduate Studies Program, The Ohio State University, Columbus, Ohio, USA.
J Int Neuropsychol Soc. 2008 Jul;14(4):620-8. doi: 10.1017/S1355617708080843.
Semantic and episodic memory networks function as highly interconnected systems, both relying on the hippocampal/medial temporal lobe complex (HC/MTL). Episodic memory encoding triggers the retrieval of semantic information, serving to incorporate contextual relationships between the newly acquired memory and existing semantic representations. While emotional material augments episodic memory encoding at the time of stimulus presentation, interactions between emotion and semantic memory that contribute to subsequent episodic recall are not well understood. Using a modified oddball task, we examined the modulatory effects of negative emotion on semantic interactions with episodic memory by measuring the free-recall of serially presented neutral or negative words varying in semantic relatedness. We found increased free-recall for words related to and preceding emotionally negative oddballs, suggesting that negative emotion can indirectly facilitate episodic free-recall by enhancing semantic contributions during encoding. Our findings demonstrate the ability of emotion and semantic memory to interact to mutually enhance free-recall.
语义记忆网络和情景记忆网络作为高度互联的系统发挥作用，二者都依赖于海马体/内侧颞叶复合体（HC/MTL）。情景记忆编码会触发语义信息的提取，有助于将新获取的记忆与现有的语义表征之间的情境关系整合起来。虽然情绪材料在刺激呈现时会增强情景记忆编码，但情绪与语义记忆之间对后续情景回忆有贡献的相互作用尚未得到充分理解。我们使用改良的oddball任务，通过测量连续呈现的语义相关性不同的中性或负面词汇的自由回忆，研究了负面情绪对情景记忆语义交互的调节作用。我们发现，与情绪上负面的oddball相关且在其之前的词汇的自由回忆有所增加，这表明负面情绪可以通过在编码过程中增强语义贡献来间接促进情景自由回忆。我们的研究结果证明了情绪和语义记忆相互作用以共同增强自由回忆的能力。
