Attentional modulation of perceptual grouping in human visual cortex: Functional MRI studies
文献类型：期刊论文
| 作者 | Han, SH; Jiang, Y ; Mao, LH; Humphreys, GW; Gu, H; S. H. Han
|
| 刊名 | HUMAN BRAIN MAPPING
 |
| 出版日期 | 2005-08-01 |
| 卷号 | 25期号:4页码:424-432 |
| 关键词 | attention fMRI perceptual grouping proximity calcarine cortex |
| ISSN号 | 1065-9471 |
| 文献子类 | Article |
| 英文摘要 | When presented with a complex visual scene, our visual system has to organize the discrete entities present into useful perceptual units. The current work investigated the neural substrates of perceptual grouping defined by Gestalt laws of proximity and similarity of shape, and whether the neural substrates underlying perceptual grouping are modulated by task relevance and spatial attention. In visual discrimination tasks, subjects identified the orientations of perceptual groups formed by proximity or sin-dlarity of local elements or alternatively identified colors of either dots around the grouped stimuli or the fixation cross. Using functional magnetic resonance imaging (fMRI), we identified that the calcarine cortex was involved in proximity grouping but not in the grouping process defined by similarity of shape. Moreover, we showed evidence that the neural correlates of proximity grouping in the calcarine cortex were weakened when the elements were of low task relevance and fell outside an attended area of field. The findings reveal the neural basis for basic grouping operations, as well as illustrating how attention and proximity grouping interact in human visual cortex.; When presented with a complex visual scene, our visual system has to organize the discrete entities present into useful perceptual units. The current work investigated the neural substrates of perceptual grouping defined by Gestalt laws of proximity and similarity of shape, and whether the neural substrates underlying perceptual grouping are modulated by task relevance and spatial attention. In visual discrimination tasks, subjects identified the orientations of perceptual groups formed by proximity or sin-dlarity of local elements or alternatively identified colors of either dots around the grouped stimuli or the fixation cross. Using functional magnetic resonance imaging (fMRI), we identified that the calcarine cortex was involved in proximity grouping but not in the grouping process defined by similarity of shape. Moreover, we showed evidence that the neural correlates of proximity grouping in the calcarine cortex were weakened when the elements were of low task relevance and fell outside an attended area of field. The findings reveal the neural basis for basic grouping operations, as well as illustrating how attention and proximity grouping interact in human visual cortex. |
| 学科主题 | 认知神经科学 |
| 语种 | 英语 |
| WOS记录号 | WOS:000230971000007 |
| 公开日期 | 2011-08-22 |
| 源URL | [http://ir.psych.ac.cn/handle/311026/5209]  |
| 专题 | 心理研究所_中国科学院心理研究所回溯数据库(1956-2010) |
| 通讯作者 | S. H. Han |
| 作者单位 | 1.Peking Univ, Dept Psychol, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Psychol, Key Lab Mental Hlth, Beijing, Peoples R China 3.Univ Birmingham, Sch Psychol, Birmingham B15 2TT, W Midlands, England 4.Beijing Chaoyang Hosp, Dept Radiol, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, SH,Jiang, Y,Mao, LH,et al. Attentional modulation of perceptual grouping in human visual cortex: Functional MRI studies[J]. HUMAN BRAIN MAPPING,2005,25(4):424-432. |
| APA | Han, SH,Jiang, Y,Mao, LH,Humphreys, GW,Gu, H,&S. H. Han.(2005).Attentional modulation of perceptual grouping in human visual cortex: Functional MRI studies.HUMAN BRAIN MAPPING,25(4),424-432. |
| MLA | Han, SH,et al."Attentional modulation of perceptual grouping in human visual cortex: Functional MRI studies".HUMAN BRAIN MAPPING 25.4(2005):424-432. |
入库方式： OAI收割
来源：心理研究所
浏览0
下载0
收藏0
其他版本
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。