中文摘要：

视觉工作记忆与人的众多基本认知能力有密切关系,是当前认知心理学、认知神经科学等多个领域的研究焦点之一.运用事件相关电位技术获得的对侧延迟活动（contralateral delay activity,CDA）,是目前已知唯一可实时追踪视觉工作记忆中存储的客体信息的神经指标,能有效反映视觉工作记忆存储的客体数目.近10年来,众多研究者运用CDA在揭示视觉工作记忆的机制与作用的研究中取得了丰硕成果.本文就CDA的来源、基本特性（幅值、时间进程、神经基础、产生机制）进行系统总结阐述,然后就CDA在研究、临床中的应用予以简要总结,最后对CDA研究中需进一步探明的一些关键问题进行了展望.

英文摘要：

Visual working memory （VWM） keeps a limited set of visual objects（3-4 simple objects）, yet it has close relationship with many of our foundamental cognitive abilities. Therefore, in the recent decade the storage mechanism of VWM has been the interest of many research fields, such as cognitive psychology, and cognitive neuroscience, etc. So far, contralateral delay activity （CDA） has been the only ERP component which can track the number of representations in VWM on-line. Using CDA researchers have achieved fruitful results in revealing VWM mechanisms in the last decade. In the current paper we first introduced the origin of CDA, and its basic properties（e.g., amplitude, time course, cerebral source） in detail; then we briefly reviewed studies using CDA on VWM exploration as well as its clinical aoolication. Finally. we discussed possible directions for future CDA research.