Raymer A M, Maher L M, Foundas A L, Heilman K M, Rothi L J
Department of Child Study and Special Education, Old Dominion University, Norfolk, VA 23529-0136, USA.
Brain Cogn. 1997 Jul;34(2):287-92. doi: 10.1006/brcg.1997.0919.
When pantomiming to command, individuals with left hemisphere brain damage (LBD) often produce errors in which they use a body part as if it were the tool (BPT). Some clinicians question the significance of this type of error because subjects without brain damage at times also make BPT responses. We analyzed BPT errors in LBD and normal subjects who were reinstructed to modify the inappropriate BPT responses when they occurred. We also analyzed errors in normal subjects who were never reinstructed if a BPT occurred. Whereas LBD subjects who were reinstructed produced significantly more BPT errors than normals who were also reinstructed, LBD subjects were not different from normals who were not reinstructed. When reinstructed, normal control subjects correctly modified virtually all BPT errors, whereas LBD subjects did not modify BPT errors. These findings underscore the need for reinstruction when a BPT error occurs to determine whether it represents a true BPT error, a sign of limb apraxia.
在通过手势示意来发指令时，左半球脑损伤（LBD）患者常常会出现错误，即他们会将身体部位当作工具来使用（身体部位-工具混淆，BPT）。一些临床医生质疑这类错误的重要性，因为没有脑损伤的受试者有时也会做出身体部位-工具混淆的反应。我们分析了LBD患者和正常受试者在出现不恰当的身体部位-工具混淆反应时被重新指导去改正这些反应的情况。我们还分析了那些即使出现身体部位-工具混淆情况也从未被重新指导的正常受试者的错误。虽然被重新指导的LBD患者比同样被重新指导的正常受试者产生了显著更多的身体部位-工具混淆错误，但LBD患者与未被重新指导的正常受试者并无差异。当被重新指导时，正常对照受试者几乎能正确改正所有身体部位-工具混淆错误，而LBD患者则不能改正身体部位-工具混淆错误。这些发现强调了在出现身体部位-工具混淆错误时进行重新指导的必要性，以确定它是否代表真正的身体部位-工具混淆错误，即肢体失用症的一种表现。
