Mevorach Carmel, Humphreys Glyn W, Shalev Lilach
Behavioural Brain Sciences Centre, School of Psychology, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
Nat Neurosci. 2006 Jun;9(6):740-2. doi: 10.1038/nn1709. Epub 2006 May 14.
Visual selection is determined in part by the saliency of stimuli. We assessed the brain mechanisms determining attentional responses to saliency. Repetitive transcranial magnetic stimulation (rTMS) was applied to the left and right posterior parietal cortices (PPC) immediately before participants were asked to identify a compound letter. rTMS to the right PPC disrupted the guidance of attention toward salient stimuli, whereas rTMS to the left PPC affected the ability to bias selection away from salient stimuli. We conclude that right and left PPC have opposite roles in biasing selection to and from salient stimuli in the environment.
视觉选择部分取决于刺激的显著性。我们评估了决定对显著性注意力反应的大脑机制。在参与者被要求识别一个复合字母之前，立即对左右后顶叶皮质（PPC）施加重复经颅磁刺激（rTMS）。对右侧PPC的rTMS干扰了将注意力导向显著刺激的引导，而对左侧PPC的rTMS影响了使选择偏向远离显著刺激的能力。我们得出结论，左右PPC在偏向选择环境中显著刺激和远离显著刺激方面具有相反的作用。
