在子前双叶皮层中,位置和规模不变的对象中心空间定位动态地适应认知需求
Bahareh Taghizadeh1,2, Ole Fortmann1,3, Alexander Gail4,5,6,7
1Sensorimotor Group, German Primate Center, Göttingen, Germany.
Nature communications
|April 18, 2024
概括
研究人员发现,参与计划运动的脑部区域使用了自我中心和全中心空间编码. 这个参考框架基于认知需求而变化,而不仅仅是大脑区域本身.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 灵长类动物研究
背景情况:
- 自我中心空间编码是大脑背部通路的一个已知的功能.
- 之前的研究集中在运动准备期间的自我中心处理.
研究的目的:
- 为了研究背部流达到规划区域的空间编码.
- 为了确定是否存在偏心编码,并且对对象转换不变.
主要方法:
- 两只雄性 rhesus 子执行了一项任务,包括记住物体位置.
- 子计划达到可变位置和大小的重复出现的对象.
主要成果:
- 在头顶触及区域和背部前运动皮层中发现了全中心 (和自我中心) 编码.
- 这种编码对对象的位置和大小是不变的.
- 在同一个神经元中,人们观察到一种从偏心 (记忆) 编码到自我中心 (计划) 编码的动态转变.
结论:
- 在空间处理中使用的参考框架是根据认知需求动态调整的.
- 这表明在背部流域内的空间表示具有灵活性.
- 大脑区域或处理流与认知任务要求相比,对参考框架的决定性较小.
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