Watanabe T, Sasaki Y, Miyauchi S, Putz B, Fujimaki N, Nielsen M, Takino R, Miyakawa S
Department of Psychology, Boston University, Boston, Massachusetts 02215, USA.
J Neurophysiol. 1998 Apr;79(4):2218-21. doi: 10.1152/jn.1998.79.4.2218.
Effects of attention to a local contour of a moving object on the activation of human primary visual cortex (area V1) were examined. Local cerebral oxygenation changes (an index of neuronal activity) in human area V1 were measured with functional magnetic resonance imaging (fMRI) in conditions including the following two: 1) when attention was selectively directed toward one side of a moving wedge (the attention condition) and 2) when the wedges were viewed passively (the passive condition). Activation in area V1 was found to be higher in the attention condition than in the passive condition. To our knowledge, this is the first finding that attention to motion activates as early as area V1. We suggest that attentional activation of area V1 is task dependent.
研究了对移动物体局部轮廓的注意对人类初级视觉皮层（V1区）激活的影响。在以下两种条件下，通过功能磁共振成像（fMRI）测量了人类V1区的局部脑氧合变化（神经元活动指标）：1）当注意力选择性地指向移动楔形物的一侧时（注意力条件）和2）当被动观察楔形物时（被动条件）。发现V1区在注意力条件下的激活高于被动条件。据我们所知，这是首次发现对运动的注意最早可激活到V1区。我们认为V1区的注意力激活是任务依赖的。
