Towards explaining spatial touch perception: Weighted integration of multiple location codes.
Towards explaining spatial touch perception: Weighted integration of multiple location codes.
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DOI：
10.1080/02643294.2016.1168791
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发表时间：
2016-02
影响因子：
3.4
通讯作者：
Heed T
中科院分区：
文献类型：
--
作者：
Badde S;Heed T
触摸被束缚在皮肤上，也就是说，被束缚在身体的边缘。然而，初级体感皮层神经元的活动只是反映了传感器在皮肤上的空间分布。为了确定触觉刺激在身体上的位置，必须考虑身体的空间布局。此外，为了将触摸与外部世界联系起来，必须评估身体姿势。在这篇综述中，我们认为默认情况下，任何触觉刺激都包含姿势。然而，外部位置的相关性及其在行为中的表达取决于各种感觉和认知因素。综上所述，这些因素表明，当我们的注意力集中在世界上而不是自己的身体上时，触觉的外部表征主导了基于皮肤的解剖结构。我们得出结论，触摸定位是一个重建过程，在保持所有可用空间信息的同时，根据上下文进行调整。
Touch is bound to the skin – that is, to the boundaries of the body. Yet, the activity of neurons in primary somatosensory cortex just mirrors the spatial distribution of the sensors across the skin. To determine the location of a tactile stimulus on the body, the body's spatial layout must be considered. Moreover, to relate touch to the external world, body posture has to be evaluated. In this review, we argue that posture is incorporated, by default, for any tactile stimulus. However, the relevance of the external location and, thus, its expression in behaviour, depends on various sensory and cognitive factors. Together, these factors imply that an external representation of touch dominates over the skin-based, anatomical when our focus is on the world rather than on our own body. We conclude that touch localization is a reconstructive process that is adjusted to the context while maintaining all available spatial information.