Sensory attenuation of self-touch, that is, the perceptual reduction of self-generated tactile stimuli, is considered a neurocognitive basis for self-other distinction. However, whether this effect can also be found in upper limb amputees using a prosthesis is unknown. Thirteen participants were asked to touch their foot sole with a) their intact hand (self-touch), b) their prosthesis (prosthesis-touch), or c) let it be touched by another person (other-touch). Intensity of touch was assessed with a questionnaire. In addition, prosthesis embodiment was assessed in nine participants. Self-touch as well as prosthesis-touch was characterized by significant perceptual attenuation compared to other-touch, while self- and prosthesis-touch did not differ. The more embodied the prosthesis was, the more similar was its elicited touch perception to actual self-touch. These findings – although preliminary – suggest that perceptually embodied prostheses can be represented as an actual limb by the users’ sensorimotor system.

自我触觉的感官衰减，即自我产生的触觉刺激的知觉减少，被认为是自我与他者区分的神经认知基础。然而，在使用假肢的上肢截肢者中是否也能发现这种效应尚不清楚。13 名参与者被要求用 a) 完整的手（自我触摸），b）他们的假肢（假肢触摸），或 c）让另一个人触摸（其他触摸）来触摸他们的脚底。用问卷评估触摸强度。此外，在九名参与者中评估了假肢实施例。与其他触摸相比，自体触摸和假体触摸的特点是显着的知觉衰减，而自体触摸和假体触摸没有区别。假肢越具体，更相似的是它引发的触摸感知与实际的自我触摸。这些发现——尽管是初步的——表明感知体现的假肢可以被用户的感觉运动系统表示为一个实际的肢体。