According to implicit accounts, human self-awareness grounds on the so-called sense of ownership (SoO). Empirical investigations of SoO have mostly focused on the manipulation of self-ascription of sensations and experiences involving the body via the induction of bodily illusions, such as the Rubber-Hand Illusion (RHI). While it has been proposed that the affective dimension necessarily contributes to the development of a full ownership ascription, the relationship between affective experience and body ownership still presents many open questions. This study thus aimed at investigating the boundaries of ownership ascriptions and the extent to which an external object can be incorporated within one's own body representation, with a specific focus on the possibility for it to become a potential object of own affective experience marked by specific electrophysiological responses. Therefore, we induced RHI in 16 participants and then applied an aversive vs. pleasant stimulation to the embodied external object, while monitoring their electrophysiological activity for central physiological markers of affective processing. Data analysis revealed the effect of the stimulation condition on alpha band power over frontal areas, with higher alpha power during the pleasant stimulation condition with respect to the aversive stimulation one over medial and right frontal electrode sites. The present findings add to the limited pieces of evidence concerning the link between experiences of illusory body ownership, embodiment mechanisms, and affective factors, suggesting that the boundaries of body ownership might be extended to making incorporated objects the source of complex emotional responses beyond basic defensive reactions.

中文翻译：

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将身体所有权扩展到具身人造手的情感体验：功率谱调查。

根据隐含的说法，人类的自我意识基于所谓的主人翁意识（SoO）。SoO 的实证研究主要集中在通过诱发身体错觉（例如橡皮手错觉 (RHI)）来操纵涉及身体的感觉和体验的自我描述。虽然有人提出情感维度必然有助于完全所有权归属的发展，但情感体验和身体所有权之间的关系仍然存在许多悬而未决的问题。因此，这项研究旨在调查所有权归属的界限以及外部物体可以在多大程度上融入自己的身体表征，特别关注它成为以特定电生理反应为标志的自己情感体验的潜在对象的可能性。因此，我们在 16 名参与者中诱导了 RHI，然后对具体化的外部物体施加了厌恶与愉悦的刺激，同时监测他们的电生理活动以获取情感处理的中央生理标记。数据分析揭示了刺激条件对额叶区域的 alpha 波段功率的影响，在愉快的刺激条件下，相对于内侧和右额叶电极部位的厌恶刺激，具有更高的 alpha 功率。目前的研究结果增加了关于幻觉身体所有权体验、体现机制和情感因素之间联系的有限证据，