人类视觉皮层中的定向表示:非视觉信息和行动相关过程的贡献
Thanaphop Threethipthikoon1, Zhen Li2,3, Hiroaki Shigemasu4
1Graduate School of Engineering, Kochi University of Technology, Kochi, Japan.
Frontiers in psychology
|December 18, 2023
概括
人类大脑使用非视觉线索来处理对象定向,如触觉和自身感知,即使没有视觉. 这种大脑活动对于指导抓取行为至关重要.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 视觉处理 视觉处理
背景情况:
- 人类大脑的视觉皮层处理对象定向,这对于指导抓取等行动至关重要.
- 视觉皮层甚至可以在没有直接视觉输入的情况下处理方向信息,依赖于非视觉感官信息和动作反.
研究的目的:
- 研究视觉皮层如何使用非视觉感官输入和与行动相关的过程来表示对象定向.
- 在不同的抓取条件下 (直接抓取,空气抓取,非抓取,未知抓取) 分析血液氧化水平依赖 (BOLD) 信号,以了解方向表示.
主要方法:
- 在没有在线视觉反的情况下,参与者在四个行动条件下进行了定向判断.
- 多变量模式分析 (MVPA) 用于根据皮质活动模式对方向表示进行分类.
- 在不同的抓取任务中检查了血液氧化水平依赖 (BOLD) 信号.
主要成果:
- 在直接抓取时发现了显著的方向解码,表明了强大的处理.
- 在抓住空气时,只有早期的视觉区域显示出显著的准确性,这表明触觉反会影响更高的视觉区域.
- 在非抓取过程中没有发生显著的解码,这突显了抓取动作本身的重要性.
- 不知情的抓取揭示了V3d和V3v中的显著解码,这表明与行动相关的过程和视觉识别有所贡献.
结论:
- 在非视觉引导的抓取过程中,视觉皮层的定向处理依赖于非视觉输入.
- 导向的表示是根据行动的目的划分的:行动指导 (V3d) 或认可 (V3v).
- 这项研究阐明了在定向处理中感官反,动作和视觉皮层功能之间的复杂相互作用.
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