在对象分类过程中,神经分离和传感,决策和行动过程的整合
Thomas W James1, Kess L Folco1, Daniel J Levitas1
1Psychological and Brain Sciences, Indiana University Bloomington, USA.
Neuropsychologia
|September 28, 2023
概括
感知决策涉及证据的积累. 新的fMRI方法揭示了背部和腹部视觉流的不同作用,表明比以前理解的更大的整合.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 神经成像是一种神经成像.
背景情况:
- 人们认为,感知决策依赖于证据的积累.
- 之前的fMRI研究使用逐渐揭示来区分背部 ("动作") 和腹部 ("积累") 视觉流区域.
- 这些研究仅限于决定后的行动.
研究的目的:
- 在视觉流区域中分离感官,决策和运动组件.
- 使用扩展的渐进式揭示范式来区分"动作"和"积累器"的角色.
- 研究背部和腹部视觉流的整合.
主要方法:
- 使用了一种扩展的逐渐揭示功能磁共振成像 (fMRI) 范式.
- 包括对线索的响应,而没有决定隔离组件.
- 分析了背部和腹部视觉流区域的活动.
主要成果:
- 侧侧皮层 (腹流) 显示出一个选择性的"积累器"形状.
- 状回形区域 (腹流) 受动生成的影响.
- 背流区域表现出类似于电机和突出网络的配置文件.
结论:
- 由于高度选择性的"累积器"或"动作"区域,视觉流可能看起来是分离的.
- 背部和腹部流之间的整合可能通过不那么有选择性,分级响应区域来实现.
- 这些发现完善了对视觉流在决策和行动中的作用的理解.
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