CORC  > 清华大学
Neural activities of tactile cross-modal working memory in humans: An event-related potential study
Ohara, S. ; Wang, L. ; Ku, Y. ; Lenz, F. A. ; Hsiao, S. S. ; Hong, B. ; Zhou, Y. -D.
2010-05-11 ; 2010-05-11
关键词auditory ERP cross-modal human working memory PRIMARY SOMATOSENSORY CORTEX POSTERIOR PARIETAL CORTEX PRIMARY VISUAL-CORTEX PREFRONTAL CORTEX SPATIAL ATTENTION NEURONAL-ACTIVITY AUDITORY-STIMULI PREMOTOR CORTEX FUNCTIONAL MRI RHESUS-MONKEY Neurosciences
中文摘要In the present study, we examined the neural mechanisms underlying cross-modal working memory by analyzing scalp-recorded event-related potentials (ERPs) from normal human subjects performing tactile-tactile unimodal or tactile-auditory cross-modal delay tasks that consisted of stimulus-1 (S-1, tactile), interval (delay), and stimulus-2 (S-2, tactile or auditory). We hypothesized that there would be sequentially discrete task-correlated changes in ERPs representing neural processes of tactile working memory, and in addition, significant differences would be observed in ERPs between the unimodal task and the cross-modal task. In comparison to the ERP components in the unimodal task, two late positive ERP components (LPC-1 and LPC-2) evoked by the tactile S-1 in the delay of the cross-modal task were enhanced by expectation of the associated auditory S-2 presented at the end of the delay. Such enhancement might represent neural activities involved in cross-modal association between the tactile stimulus and the auditory stimulus. Later in the delay, a late negative component (LNC) was observed. The amplitude of LNC depended on information retained during the delay, and when the same information was retained, this amplitude was not influenced by modality or location of S-2 (auditory S-2 through headphones, or tactile S-2 on the left index finger). LNC might represent the neural activity involved in working memory. The above results suggest that the sequential ERP changes in the present study represent temporally distinguishable neural processes, such as the cross-modal association and cross-modal working memory. (C) 2008 IBRO. Published by Elsevier Ltd. All rights reserved.
语种英语 ; 英语
出版者PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
内容类型期刊论文
源URL[http://hdl.handle.net/123456789/27711]  
专题清华大学
推荐引用方式
GB/T 7714
Ohara, S.,Wang, L.,Ku, Y.,et al. Neural activities of tactile cross-modal working memory in humans: An event-related potential study[J],2010, 2010.
APA Ohara, S..,Wang, L..,Ku, Y..,Lenz, F. A..,Hsiao, S. S..,...&Zhou, Y. -D..(2010).Neural activities of tactile cross-modal working memory in humans: An event-related potential study..
MLA Ohara, S.,et al."Neural activities of tactile cross-modal working memory in humans: An event-related potential study".(2010).
个性服务
查看访问统计
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。


©版权所有 ©2017 CSpace - Powered by CSpace