Fairhall Scott L, Ishai Alumit
Institute of Neuroradiology, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
Conscious Cogn. 2008 Sep;17(3):923-32. doi: 10.1016/j.concog.2007.07.005. Epub 2007 Aug 21.
Indeterminate art invokes a perceptual dilemma in which apparently detailed and vivid images resist identification. We used event-related fMRI to study visual perception of representational, indeterminate and abstract paintings. We hypothesized increased activation along a gradient of posterior-to-anterior ventral visual areas with increased object resolution, and postulated that object resolution would be associated with visual imagery. Behaviorally, subjects were faster to recognize familiar objects in representational than in both indeterminate and abstract paintings. We found activation within a distributed cortical network that includes visual, parietal, limbic and prefrontal regions. Representational paintings, which depict scenes cluttered with familiar objects, evoked stronger activation than indeterminate and abstract paintings in higher-tier visual areas. Perception of scrambled paintings was associated with imagery-related activation in the precuneus and prefrontal cortex. Finally, representational paintings evoked stronger activation than indeterminate paintings in the temporoparietal junction. Our results suggest that perception of familiar content in art works is mediated by object recognition, memory recall and mental imagery, cognitive processes that evoke activation within a distributed cortical network.
不确定艺术引发了一种感知困境，在这种困境中，看似细节丰富且生动的图像难以识别。我们使用事件相关功能磁共振成像来研究具象画、不确定画和抽象画的视觉感知。我们假设随着从后到前腹侧视觉区域梯度上物体分辨率的提高，激活会增加，并推测物体分辨率将与视觉意象相关。在行为上，受试者识别具象画中熟悉物体的速度比识别不确定画和抽象画中的要快。我们发现激活存在于一个包括视觉、顶叶、边缘和前额叶区域的分布式皮质网络中。描绘充满熟悉物体场景的具象画，在高级视觉区域比不确定画和抽象画引发更强的激活。对打乱的画作的感知与楔前叶和前额叶皮质中与意象相关的激活有关。最后，具象画在颞顶联合区比不确定画引发更强的激活。我们的结果表明，艺术作品中熟悉内容的感知是由物体识别、记忆回忆和心理意象介导的，这些认知过程会在一个分布式皮质网络中引发激活。
