Amputation and prosthesis implantation shape body and peripersonal space representations.
Amputation and prosthesis implantation shape body and peripersonal space representations.
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DOI：
10.1038/srep02844
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发表时间：
2013-10-03
影响因子：
4.6
通讯作者：
Serino, Andrea
中科院分区：
文献类型：
--
作者：
Canzoneri, Elisa;Marzolla, Marilena;Amoresano, Amedeo;Verni, Gennaro;Serino, Andrea
关于身体（BR）和身体周围空间（Peripersonal Space，PPS）的多模态表征是否以及如何适应截肢和假体植入，人们知之甚少。为了研究这个问题，我们测试了BR在一组上肢截肢者通过触觉距离知觉任务和PPS通过听觉触觉交互任务。受试者在佩戴或不佩戴假肢的情况下，在健康肢体或截肢残端上进行刺激。当患者在没有假肢的截肢上执行任务时，手臂长度的感知缩小，同时PPS边界向残肢移动。相反，佩戴假肢增加了残肢的感知长度，并延长了PPS边界，以便包括假手，使得假肢部分替代了缺失的肢体。
Little is known about whether and how multimodal representations of the body (BRs) and of the space around the body (Peripersonal Space, PPS) adapt to amputation and prosthesis implantation. In order to investigate this issue, we tested BR in a group of upper limb amputees by means of a tactile distance perception task and PPS by means of an audio-tactile interaction task. Subjects performed the tasks with stimulation either on the healthy limb or the stump of the amputated limb, while wearing or not wearing their prosthesis. When patients performed the tasks on the amputated limb, without the prosthesis, the perception of arm length shrank, with a concurrent shift of PPS boundaries towards the stump. Conversely, wearing the prosthesis increased the perceived length of the stump and extended the PPS boundaries so as to include the prosthetic hand, such that the prosthesis partially replaced the missing limb.
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