INACCURATE REACHING ASSOCIATED WITH A SUPERIOR PARIETAL LOBE TUMOR
INACCURATE REACHING ASSOCIATED WITH A SUPERIOR PARIETAL LOBE TUMOR
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DOI：
10.1212/wnl.28.6.556
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发表时间：
1978-01-01
期刊：
影响因子：
9.9
通讯作者：
MOHR, JP
中科院分区：
文献类型：
--
作者：
LEVINE, DN;KAUFMAN, KJ;MOHR, JP
一位在右侧上级顶叶有肿瘤的男性患者，很难够到可视化的物体。在视觉感觉、视觉注意、躯体感觉功能、基本运动、实践或视觉空间表现方面没有明显缺陷。如果在伸手之前允许他在视觉上注视目标，他只会用左臂失误，而且只会在不允许他观察伸出的肢体时失误。如果他需要保持中央视觉固定，同时达到他的周边视野，他的左臂误伸到两个视觉半野，但他的右臂误伸到左视觉半野。这些结果表明，异常，可归因于对侧手臂和对侧视野，既不能减少到视觉或躯体感觉功能的基本障碍，也不能减少到运动的基本障碍。这种错误的模式以前没有在人类受试者或实验动物中报道，但这可能是由于方法的差异。在这个病人中观察到的误触可能对应于后顶叶神经元的损失，服务于超模态整合功能。
A man with a tumor in the right superior parietal lobule had difficulty reaching for visualized objects. There were no significant deficits in visual sensation, visual attention, somatosensory function, elementary motility, praxis or visuospatial performance. If allowed to visually fixate the target before reaching, he misreached only with his left arm and only when he was not allowed to observed the reaching limb. If he was required to maintain central visual fixation while reaching into his peripheral visual fields, his left arm misreached into both visual hemifields but his right arm misreached only into the left visual hemifield. These results demonstrate abnormalities, referable to the contralateral arm and contralateral visual field, that can neither be reduced to elementary disturbances of visual or somatosensory function nor to an elementary disturbance of motility. This pattern of misreaching was not previously reported in human subjects or experimental animals, but this may be attributable to differences of methodology. The misreaching observed in this patient may correspond to loss of posterior parietal neurons serving a supramodal integrative function.