Department of Physical Medicine and Rehabilitation, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575, Japan.
Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Japan.
Sci Rep. 2023 Sep 26;13(1):16143. doi: 10.1038/s41598-023-43410-5.
The sense of body ownership, the feeling that one's body belongs to oneself, is a crucial subjective conscious experience of one's body. Recent methodological advances regarding crossmodal illusions have provided novel insights into how multisensory interactions shape human perception and cognition, underpinning conscious experience, particularly alteration of body ownership. Moreover, in post-stroke rehabilitation, encouraging the use of the paretic limb in daily life is considered vital, as a settled sense of ownership and attentional engagement toward the paralyzed body part may promote increased frequency of its use and prevent learned nonuse. Therefore, in addition to traditional methods, novel interventions using neurorehabilitation techniques that induce self-body recognition are needed. This study investigated whether the illusory experience of a patient's ownership alterations of their paretic hand facilitates the enhancement in the range of motion of succeeding imitation movements. An experiment combining a modified version of the rubber hand illusion with imitation training was conducted with chronic hemiplegia. A larger imitation movement of the paretic hand was observed in the illusion-induced condition, indicating that the feeling of ownership toward the observed limb promotes the induction of intrinsic potential for motor performance. This training, using subjective experience, may help develop new post-stroke rehabilitation interventions.
躯体所有权意识，即一个人感觉自己的身体属于自己，是对自己身体的一种关键的主观意识体验。最近关于跨模态错觉的方法学进展为我们提供了新的见解，即多感觉交互如何塑造人类的感知和认知，从而支撑有意识的体验，特别是躯体所有权的改变。此外，在中风后康复中，鼓励在日常生活中使用瘫痪肢体被认为至关重要，因为对瘫痪身体部位的稳定的所有权意识和注意力参与可能会促进其使用频率的增加，并防止习得性废用。因此，除了传统方法外，还需要使用诱导自我身体识别的神经康复技术的新干预措施。本研究调查了患者对瘫痪手的所有权错觉体验是否有助于增强随后模仿运动的运动范围。在慢性偏瘫患者中进行了一项结合了改良版橡胶手错觉和模仿训练的实验。在产生错觉的条件下，观察到对瘫痪手的更大模仿运动，这表明对观察到的肢体的所有权感觉促进了内在运动表现潜力的诱导。这种使用主观体验的训练可能有助于开发新的中风后康复干预措施。
