Kasai Tetsuko, Morita Hiromi, Kumada Takatsune
Cognition and Action Group, Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan.
Vision Res. 2007 Jan;47(2):203-9. doi: 10.1016/j.visres.2006.09.023. Epub 2006 Nov 7.
This study investigated event-related brain potentials (ERPs) during selective attention to the orientation of a bar comprised of two squares, which were defined by only color or motion (intra-attribute conditions) or both (interattribute condition). An early positive potential in association with orientation selection was elicited for all conditions in similar latency ranges but with different scalp distributions. These results suggest that attribute-invariant orientations can be discriminated at an early stage of processing in the human brain, which fills a gap between monkey electrophysiology and human psychophysics, while attribute-specific orientations are also available in a given context.
本研究调查了在选择性注意由两个正方形组成的条的方向时的事件相关脑电位（ERP），这些正方形仅由颜色或运动（属性内条件）或两者（属性间条件）定义。在所有条件下，与方向选择相关的早期正电位在相似的潜伏期范围内引出，但头皮分布不同。这些结果表明，属性不变的方向可以在人类大脑处理的早期阶段被区分，这填补了猴子电生理学和人类心理物理学之间的空白，同时在特定背景下也存在属性特定的方向。
