Haaland K Y, Flaherty D
Brain Cogn. 1984 Oct;3(4):370-84. doi: 10.1016/0278-2626(84)90029-0.
Limb apraxia errors were compared among normal controls and right- or left-hemisphere-damaged patients as they imitated gestures with the ipsilateral hand. Both brain-damaged groups made similar errors on nonrepresentative and representative/intransitive movements. In contrast for pretended object use movements (transitive), the left-hemisphere-damaged group made more arm position and classical body-part-as-object errors while the right hemisphere group made as many partial errors and more less-primitive, body-part-as-object errors than the left-hemisphere-damaged group. These results help explain why a certain percentage of right-hemisphere-damaged patients are labeled apraxic, but also suggest that the left hemisphere is more important for integrating intrapersonal space and the "representation" of extrapersonal space.
在正常对照组以及右侧或左侧半球受损患者模仿同侧手的手势时，对肢体失用错误进行了比较。两组脑损伤患者在非代表性和代表性/非传递性动作上出现了类似的错误。相比之下，在假装使用物体的动作（传递性动作）中，左侧半球受损组出现了更多的手臂位置错误和典型的将身体部位当作物体的错误，而右侧半球组出现的部分错误与左侧半球受损组一样多，且出现的不太原始的将身体部位当作物体的错误比左侧半球受损组更多。这些结果有助于解释为什么一定比例的右侧半球受损患者被诊断为失用症，同时也表明左侧半球对于整合个人空间和外部空间的“表征”更为重要。
