Department of Speech & Hearing Sciences, University of Washington, 1715 Columbia Road N, Box 357988, Seattle, WA 98195, USA.
Neuroimage. 2013 Jan 1;64:365-70. doi: 10.1016/j.neuroimage.2012.09.006. Epub 2012 Sep 11.
Successful rapid deployment of attention to relevant sensory stimuli is critical for survival. In a complex environment, attention can be captured by salient events or be deployed volitionally. Furthermore, when multiple events are of interest concurrently, effective interaction with one's surroundings hinges on efficient top-down control of shifting attention. It has been hypothesized that two separate cortical networks coordinate attention shifts across multiple modalities. However, the cortical dynamics of these networks and their behavioral relevance to switching of auditory attention are unknown. Here we show that the strength of each subject's right temporoparietal junction (RTPJ, part of the ventral network) activation was highly correlated with their behavioral performance in an auditory task. We also provide evidence that the recruitment of the RTPJ likely precedes the right frontal eye fields (FEF; participating in both the dorsal and ventral networks) and middle frontal gyrus (MFG) by around 100 ms when subjects switch their auditory spatial attention.
成功快速地将注意力转移到相关的感官刺激对于生存至关重要。在复杂的环境中，注意力可以被显著的事件吸引，也可以被主动转移。此外，当多个事件同时引起关注时，有效地与周围环境进行交互取决于有效地自上而下地控制注意力的转移。人们假设两个独立的皮质网络协调跨多种模式的注意力转移。然而，这些网络的皮质动力学及其对听觉注意力切换的行为相关性尚不清楚。在这里，我们表明每个被试的右侧颞顶联合区（RTPJ，腹侧网络的一部分）激活的强度与其在听觉任务中的行为表现高度相关。我们还提供了证据，表明当被试转换听觉空间注意力时，RTPJ 的招募可能比右侧额眼区（FEF；参与背侧和腹侧网络）和中额回（MFG）早约 100 毫秒。
