Moss Rehabilitation Research Institute, and Temple University School of Medicine, Philadelphia, USA.
Cogn Neuropsychol. 2001 Jun 1;18(4):363-81. doi: 10.1080/02643290126218.
We report a patient with autotopagnosia (JD) who was unable to code the position of body parts relative to each other and who failed to update the position of body parts after passive movements. JD's performance in Studies 1-4 suggest that her ability to code the dynamic location of body parts with respect to each other ("intrinsic egocentric" spatial coding) was impaired, and that she employed a compensatory strategy by means of which the location of body parts was computed with respect to objects in the environment ("extrinsic egocentric" spatial coding). Studies 5-8 suggest that JD's ability to update hand position information was impaired after passive relative to active movements of her arm. For example, she was impaired in reaching to a target after passive but not active movements of her hand. Taken together, these findings extend previously reported functions of extrinsic egocentric coding to the localisation of body parts and demonstrate a possible dissociation between body part localisation dependent upon proprioceptive and efference copy information.
我们报告了一位患有自体失认症（JD）的患者，他无法对身体部位之间的位置进行编码，并且在被动运动后无法更新身体部位的位置。JD 在研究 1-4 中的表现表明，她对身体部位相对于彼此的动态位置进行编码的能力（“内在自我中心”空间编码）受损，并且她采用了一种补偿策略，通过该策略，身体部位的位置是相对于环境中的物体计算的（“外在自我中心”空间编码）。研究 5-8 表明，JD 在手臂被动运动后更新手部位置信息的能力受损，而在手臂主动运动后则不受影响。综上所述，这些发现将先前报道的外在自我中心编码的功能扩展到了身体部位的定位，并证明了依赖于本体感觉和传出副本信息的身体部位定位之间可能存在分离。
