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在你的皮肤? 人体感官皮质被故意招募来定位,但不模拟代理触摸
Bettina Forster1, Sonia Abad-Hernando2
1Centre for Clinical, Social and Cognitive Neuroscience, School of Health and Psychological Sciences, City, University of London, Northampton Square, London EC1V 0HB, UK.
NeuroImage
|March 1, 2024
概括
代理触摸并不能自动激活早期的感觉大脑区域,例如对纹理的体感皮质 (SCx). 当注意力转向触摸时,SCx就会被使用,但它只能定位,而不是完全模拟体验.
科学领域:
- 神经科学是一个神经科学.
- 身体感官研究研究 身体感官研究
- 认知神经科学 认知神经科学
背景情况:
- 代理触摸研究表明,在体感皮质 (SCx) 中观察到触摸的自动模拟.
- 这些激活的反射性质和它们对触摸品质 (如纹理) 的表示仍然不清楚.
研究的目的:
- 调查体感皮层 (SCx) 中代理触摸效应的时间.
- 为了确定早期感官区域是否在代理触摸时被反射激活.
- 检查SCx激活是否代表特定的触摸品质,例如纹理.
主要方法:
- 测量了与事件相关的潜力 (ERP),以映射SCx等级处理阶段.
- 参与者观察了一只手上的触摸/不触摸和不同的纹理 (软泡,硬) (实验1和2).
- 一个去/不去的任务跟随着触摸序列来探测SCx活动并隔离代理触摸效应.
主要成果:
- 代理触摸 (触摸与无触摸,软与硬) 并没有调节早期的感觉ERP组件 (P50,N80).
- 对后续任务的行为反应显示出后感知效应.
- 比较其他指导式与自我指导式触摸调制的早期/中期延迟ERP (P50,N80,P100,N140),表明早期SCx激活.
- 这些早期的感官激活不是通过触摸纹理来调节的.
结论:
- 当参与者参加观察触摸时,体感皮层 (SCx) 被有目的地招募.
- 在代理触摸时早期的SCx激活并不代表特定的触摸品质,如纹理.
- 观察到的触摸体验位于SCx中,而不是完全模拟,当注意力被引导时,在代理触摸时.
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