Department of Experimental Psychology, Helmholtz Institute, Utrecht University, Heidelberglaan 1, 3584 CS, Utrecht, The Netherlands.
Department of Psychiatry, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
Psychol Res. 2021 Apr;85(3):1221-1233. doi: 10.1007/s00426-020-01316-1. Epub 2020 Mar 20.
Body integrity identity disorder (BIID) is a rare condition defined by a persistent desire to amputate or paralyze a healthy limb (usually one or both of the legs). This desire arises from experiencing a mismatch between the internal body model and the actual physical/functional boundaries of the body. People with BIID show an abnormal physiological response to stimuli approaching the affected (unwanted) but not the unaffected leg, which might suggest a retracted peripersonal space (PPS: a multisensory integration zone near the body) around the unwanted limb. Thus, using a visuo-tactile interaction task, we examined leg PPS in a group of healthy men and three men with BIID who desired unilateral leg amputation. PPS size (~ 70 cm) around the unwanted BIID legs did not differ from that of healthy controls. Although the leg feels foreign in BIID, it still seems to maintain a PPS, presumably to protect it and facilitate interactions within the surrounding environment.
身体完整性认同障碍（BIID）是一种罕见的病症，其特征是持续渴望截肢或瘫痪健康的肢体（通常是一条或两条腿）。这种愿望源于内部身体模型与身体的实际物理/功能边界之间的不匹配。BIID 患者对接近受影响（不想要的）但不影响未受影响的腿部的刺激会产生异常的生理反应，这可能表明不想要的肢体周围的peripersonal 空间（PPS：身体附近的多感觉整合区域）缩回。因此，我们使用视触互动任务，研究了一组健康男性和三名希望单侧腿部截肢的 BIID 男性的腿部 PPS。不想要的 BIID 腿部周围的 PPS 大小（约 70 厘米）与健康对照组没有差异。尽管 BIID 患者的腿部感觉陌生，但它似乎仍然保持着 PPS，大概是为了保护它并促进周围环境中的互动。
