...
首页> 外文期刊>Neuropsychologia >Direct visuomotor mapping for fast visually-evoked arm movements
【24h】

Direct visuomotor mapping for fast visually-evoked arm movements

机译:直接可见运动映射,可实现视觉上快速的手臂运动

获取原文
获取原文并翻译 | 示例
           

摘要

In contrast to conventional reaction time (RT) tasks, saccadic RT's to visual targets are very fast and unaffected by the number of possible targets. This can be explained by the sub-cortical circuitry underlying eye movements, which involves direct mapping between retinal input and motor output in the superior colliculus. Here we asked if the choice-invariance established for the eyes also applies to a special class of fast visuomotor responses of the upper limb. Using a target-pointing paradigm we observed very fast reaction times (<150. ms) which were completely unaffected as the number of possible target choices was increased from 1 to 4. When we introduced a condition of altered stimulus-response mapping, RT went up and a cost of choice was observed. These results can be explained by direct mapping between visual input and motor output, compatible with a sub-cortical pathway for visual control of the upper limb.
机译:与常规反应时间(RT)任务相比,视觉目标的扫视RT速度非常快,并且不受可能目标数量的影响。这可以用眼睛运动的潜在皮层下电路来解释,该电路涉及视网膜上输入和上丘中运动输出之间的直接映射。在这里,我们询问为眼睛建立的选择不变性是否也适用于上肢的快速视觉运动反应的特殊类别。使用目标指向范式,我们观察到非常快的反应时间(<150。ms),当可能的目标选择数量从1增加到4时,反应时间完全不受影响。当我们引入刺激反应映射改变的条件时,RT并观察到选择成本。这些结果可以通过视觉输入与运动输出之间的直接映射来解释,与皮层下途径对上肢的视觉控制兼容。

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