Department of Psychology, Rikkyo University, 1-2-26, Kitano, Niiza-shi, Saitama, 352-8558, Japan.
Faculty of Informatics, Kansai University, 2-1-1, Ryozenji-cho, Takatsuki, Osaka, 569-1095, Japan.
Sci Rep. 2021 Apr 21;11(1):8651. doi: 10.1038/s41598-021-87843-2.
Our bodily sensation is a fundamental cue for our self-consciousness. Whereas experimental studies have uncovered characteristics of bodily sensation, these studies investigated bodily sensations through manipulating bodily sensations to be apart from one's own body and to be assigned to external, body-like objects. In order to capture our bodily sensation as it is, this questionnaire survey study explored the characteristics of bodily sensation using a large population-based sample (N = 580, comprising 20s to 70s age groups) without experimental manipulations. We focused on the sensations of ownership, the feeling of having a body part as one's own, and agency, the feeling of controlling a body part by oneself, in multiple body parts (the eyes, ears, hands, legs, nose, and mouth). The ownership and agency sensations were positively related to each other in each body part. Interestingly, the agency sensation of the hands and legs had a positive relationship with the ownership sensations of the other body parts. We also found the 60s age group had a unique internal configuration, assessed by the similarity of rating scores, of the body parts for each bodily sensation. Our findings revealed the existence of unique characteristics for bodily sensations in a natural state.
我们的身体感觉是自我意识的基本线索。虽然实验研究已经揭示了身体感觉的特征，但这些研究是通过操纵身体感觉来使其与自身身体分离，并将其分配给外部的类似身体的物体来进行的。为了捕捉我们身体感觉的本来面目，这项问卷调查研究使用了一个基于大量人群的样本（N=580，包括 20 多岁到 70 多岁的年龄组），没有进行实验操作，探索了身体感觉的特征。我们专注于所有权感觉，即身体某个部位属于自己的感觉，以及自主性感觉，即自己控制身体某个部位的感觉，涉及多个身体部位（眼睛、耳朵、手、腿、鼻子和嘴巴）。在每个身体部位，所有权感觉和自主性感觉之间存在正相关关系。有趣的是，手和腿的自主性感觉与其他身体部位的所有权感觉之间存在正相关关系。我们还发现，60 多岁的年龄组在每个身体感觉的评分相似性方面具有独特的内部结构。我们的研究结果揭示了自然状态下身体感觉存在独特特征。
