Weidemann Christoph T, Mollison Matthew V, Kahana Michael J
University of Pennsylvania, Philadelphia, PA 19104, USA.
Psychon Bull Rev. 2009 Apr;16(2):313-9. doi: 10.3758/PBR.16.2.313.
We studied the electrophysiological basis of object recognition by recording scalp electroencephalograms while participants played a virtual-reality taxi driver game. Participants searched for passengers and stores during virtual navigation in simulated towns. We compared oscillatory brain activity in response to store views that were targets or nontargets (during store search) or neutral (during passenger search). Even though store category was solely defined by task context (rather than by sensory cues), frontal electrophysiological activity in the low frequency bands (primarily in the [4-8 Hz] band) reliably distinguished between the target, nontarget, and neutral store views. These results implicate low-frequency oscillatory brain activity in frontal regions as an important variable in the study of the cognitive processes involved in object recognition, categorization, and other forms of high-level perception.
我们通过在参与者玩虚拟现实出租车司机游戏时记录头皮脑电图，研究了物体识别的电生理基础。参与者在模拟城镇的虚拟导航过程中寻找乘客和商店。我们比较了在面对作为目标或非目标的商店视图（在商店搜索期间）或中性视图（在乘客搜索期间）时的振荡脑活动。尽管商店类别完全由任务背景定义（而非感官线索），但低频带（主要在[4 - 8赫兹]频段）的额叶电生理活动能够可靠地区分目标、非目标和中性商店视图。这些结果表明，额叶区域的低频振荡脑活动是研究物体识别、分类及其他形式的高级感知所涉及认知过程的一个重要变量。
