Brain areas underlying visual mental imagery and visual perception: an fMRI study
被引:477
作者:
Ganis, G
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机构:Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA
Ganis, G
Thompson, WL
论文数: 0引用数: 0
h-index: 0
机构:Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA
Thompson, WL
Kosslyn, SM
论文数: 0引用数: 0
h-index: 0
机构:Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA
Kosslyn, SM
机构:
[1] Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA
[2] Massachusetts Gen Hosp, Martinos Ctr, Dept Radiol, Boston, MA 02114 USA
[3] Harvard Univ, Sch Med, Boston, MA 02115 USA
[4] Massachusetts Gen Hosp, Dept Neurol, Boston, MA 02114 USA
来源:
COGNITIVE BRAIN RESEARCH
|
2004年
/
20卷
/
02期
关键词:
visual cognition;
visual imagery;
cognitive neuroscience;
fMRI;
cognitive control processes;
D O I:
10.1016/j.cogbrainres.2004.02.012
中图分类号:
TP18 [人工智能理论];
学科分类号:
081104 ;
0812 ;
0835 ;
1405 ;
摘要:
We used functional magnetic resonance imaging (fMRI) to assess the maximal degree of shared neural processing in visual mental imagery and visual perception. Participants either visualized or saw faint drawings of simple objects, and then judged specific aspects of the drawings (which could only be evaluated properly if they used the correct stimulus). The results document that visual imagery and visual perception draw on most of the same neural machinery. However, although the vast majority of activated voxels were activated during both conditions, the spatial overlap was neither complete nor uniform; the overlap was much more pronounced in frontal and parietal regions than in temporal and occipital regions. This finding may indicate that cognitive control processes function comparably in both imagery and perception, whereas at least some sensory processes may be engaged differently by visual imagery and perception. (C) 2004 Elsevier B.V. All rights reserved.