NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, 3-1 Wakamiya, Morinosato, Atsugishi, Kanagawa, Japan.
Institute of Cognitive Neuroscience, University College London, 17-18 Queen Square, London, UK.
Commun Biol. 2024 Oct 26;7(1):1395. doi: 10.1038/s42003-024-07093-6.
Self vs. external attribution of motions based on vestibular cues is suggested to underlie our coherent perception of object motion and self-motion. However, it remains unclear whether such attribution also underlies sensorimotor responses. Here, we examined this issue in the context of touch. We asked participants to lightly touch a moving object with their thumb while standing still on an unstable surface. We measured both the accuracy of judging the object motion direction and the postural response. If the attribution underlies both object-motion perception and posture control, sensitivity of posture to object motion should decrease with motion speed since high speed motion is unlikely to reflect self-motion. Furthermore, when motion perception is erroneous, there should be a corresponding increase in postural responses. Our results are consistent with these predictions and suggest that self-external attribution of somatosensory motion underlies both object motion perception and postural responses.
基于前庭线索的自我与外部归因被认为是我们对物体运动和自身运动连贯感知的基础。然而，这种归因是否也构成了运动感觉反应的基础仍不清楚。在这里，我们在触觉的背景下研究了这个问题。我们要求参与者在不稳定的表面上静止站立时，用拇指轻触移动的物体。我们测量了判断物体运动方向的准确性和姿势反应。如果归因既构成了物体运动感知的基础，又构成了姿势控制的基础，那么由于高速运动不太可能反映自身运动，因此姿势对物体运动的敏感性应该随运动速度的增加而降低。此外，当运动感知出现错误时，姿势反应应该相应增加。我们的结果与这些预测一致，表明体感运动的自我-外部归因既构成了对物体运动的感知，也构成了姿势反应。
