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Updated: Feb 8, 2026

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在人类皮质中解码触觉和想象刺激的大小
Samantha Sartin1, Federica Danaj2, Fabio Del Giudice1
1Center for Mind/Brain Sciences (CIMeC), University of Trento, Trento, Italy.
NeuroImage
|February 6, 2026
概括
早期视觉皮层 (EVC) 在触摸时解码物体大小,但不是想象力. 这表明触觉探索,而不是视觉图像,驱动EVC活动以表示尺寸.
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:
- 包括V1在内的早期视觉皮层 (EVC) 参与触觉对象探索.
- 目前尚不清楚EVC是否代表了物体的特征,例如在没有视觉的情况下触摸时的尺寸.
研究的目的:
- 为了确定刺激大小是否可以从触觉探索期间的EVC活动中解码.
- 调查视觉图像是否解释触觉任务期间EVC中的尺寸解码.
主要方法:
- 在25名参与者身上使用了具有多变量模式分析的fMRI.
- 参与者在蒙着眼睛的情况下触觉探索或想象戒指的大小.
- 心理生理学相互作用分析检查了功能连接.
主要成果:
- 在触觉探索期间,V1和尾极 (OP) 准确地解码了尺寸,但不是图像.
- 在触觉和图像条件下,额头,头顶和LOtv区域都解码了尺寸.
- 在触觉任务中,V1和OP与视觉流的连接性增加.
结论:
- EVC活动模式反映了触觉探索期间的尺寸,独立于视觉图像.
- 边界对称区域表现出灵活的尺寸表示,可以适应任务需求.
- 一般化尺寸表示是由专门用于触觉和图像处理的区域支持的.
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