Kawashima R, Imaizumi S, Mori K, Okada K, Goto R, Kiritani S, Ogawa A, Fukuda H
IDAC, Tohoku University, Sendai, 980-8575, Japan.
Neuroimage. 1999 Aug;10(2):209-15. doi: 10.1006/nimg.1999.0452.
The purpose of this study was to reveal functional areas of the brain modulating processing of selective auditory or visual attention toward utterances. Regional cerebral blood flow was measured in six normal volunteers using positron emission tomography during two selective attention tasks and a control condition. The auditory task activated the auditory, inferior parietal, prefrontal, and anterior cingulate cortices. The visual task activated the visual association, inferior parietal, and prefrontal cortices. Both conditions activated the same area in the superior temporal sulcus. During the visual task, deactivation was observed in the auditory cortex. These results indicate that there exists a modality-dependent selective attention mechanism which activates or deactivates cortical areas in different ways.
本研究的目的是揭示大脑中调节对言语进行选择性听觉或视觉注意加工的功能区域。在两项选择性注意任务和一种对照条件下，使用正电子发射断层扫描技术对6名正常志愿者的局部脑血流量进行了测量。听觉任务激活了听觉、顶下、前额叶和前扣带回皮质。视觉任务激活了视觉联合区、顶下和前额叶皮质。两种条件均激活了颞上沟中的同一区域。在视觉任务期间，观察到听觉皮质失活。这些结果表明，存在一种依赖于感觉模态的选择性注意机制，该机制以不同方式激活或失活皮质区域。
