...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The European Journal of Neuroscience >Sensitivity to optic flow in human cortical areas MT and MST.
【24h】

Sensitivity to optic flow in human cortical areas MT and MST.

机译：对人类皮层区域MT和MST中光流的敏感性。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The macaque V5/MT complex comprises several sub-regions but little is known of their human homologues. We examined human V5/MT with fMRI in terms of specificity to optic flow stimuli, a key characteristic of macaque MST. Stimuli were large fields of moving dots, forming coherent global flow patterns. Random motion was used as a control. Retinotopic mapping was also conducted. The previously suggested existence of at least two distinct sub-regions, MT and MST, within the V5/MT complex was confirmed. Human MT is activated about equally by all moving dot patterns, including random motion, suggesting that it has little sensitivity to global flow structure. As previously described, this region shows strong signs of retinotopic organization and is only weakly activated by stimuli confined to the ipsilateral hemifield. In human MST, located immediately anterior to MT and strongly driven by ipsilateral stimuli, activation varies markedly with optic flow structure. The strongest activation is produced by complex flow that contains multiple flow components (expansion, contraction and rotation). Single components produce rather less response, while rigid translation and random motion produce less still. The results suggest that human MST is strongly specialized for encoding global flow properties, while human MT is less so.
机译：猕猴V5 / MT复合体包含几个子区域，但鲜为人知。我们用功能磁共振成像检查了人类V5 / MT对猕猴MST的关键特征光流刺激的特异性。刺激是移动点的大区域，形成连贯的整体流动模式。随机运动用作对照。还进行了视网膜斑点定位。证实了先前提出的在V5 / MT复合物中存在至少两个不同的子区域MT和MST。人类MT被所有运动的点模式（包括随机运动）大致均等地激活，这表明它对整体流动结构几乎没有敏感性。如前所述，该区域显示出视网膜组织的强烈迹象，并且仅受限于同侧半视野的刺激而被弱激活。在人类MST中，其位于MT的正前方，并受到同侧刺激的强烈驱动，其激活随视流结构而显着变化。最强的激活作用是由包含多个流分量（膨胀，收缩和旋转）的复杂流产生的。单个组件产生的响应较少，而刚性平移和随机运动产生的响应较少。结果表明，人类MST专门用于编码全局流动特性，而人类MT则相对较少。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号