Areas of the human brain activated by ambient visual motion, indicating three kinds of self-movement
Areas of the human brain activated by ambient visual motion, indicating three kinds of self-movement
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DOI：
10.1007/s00221-001-0947-y
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发表时间：
2002-03-01
影响因子：
2
通讯作者：
Liotti, M
中科院分区：
文献类型：
--
作者：
Beer, J;Blakemore, C;Liotti, M
在一项正电子发射断层扫描(PET)研究中，一个非常大的视觉显示器被用来模拟观察者连续的滚动、偏航和深度的线性运动。一项基于所有三个实验的全球分析确定了对这三个条件的共同特征做出反应的大脑区域，即连贯的、宽视野的运动与不连贯的运动。在后下方的颞叶皮质(Brodmann区37)、边缘旁皮质、枕叶和中脑被盖中识别出几个区域。此外，枕区KO对侧滚和扩张敏感，但对偏航(即包含差异流动的相干显示)不敏感。持续的环境运动不能选择性地激活V5/MT。与一致运动和非一致运动在视觉区域V1、V2和V3中引起的广泛的、连续的激活形成鲜明对比的是，对一致运动作出特殊反应的部位网络。连贯性运动机制。此外，除了传统的解释视觉运动加工的背侧通路外，还包括皮质下和边缘结构，它们与多感觉加工、姿势调节和唤醒有关。
In a positron emission tomography (PET) study, a very large visual display was used to simulate continuous observer roll, yaw, and linear movement in depth. A global analysis based on all three experiments identified brain areas that responded to the three conditions' shared characteristic of coherent, wide-field motion versus incoherent motion. Several areas were identified, in the posterior-inferior temporal cortex (Brodmann area 37), paralimbic cortex, pulvinar, and midbrain tegmentum. In addition, occipital region KO was sensitive to roll and expansion but not yaw (i.e., coherent displays containing differential flow). Continuous ambient motion did not activate V5/MT selectively. The network of sites responding specifically to coherent motion contrasted with the extensive, contiguous activation that both coherent and incoherent motion elicited in visual areas V1, V2, and V3. The coherent motion mechanisms. furthermore, extended beyond the traditional dorsal pathway proposed to account for visual motion processing, and included subcortical and limbic structures, which are implicated in polysensory processing, posture regulation, and arousal.