Optic ataxia: from Balint's syndrome to the parietal reach region.

Optic ataxia: from Balint's syndrome to the parietal reach region.
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DOI:
10.1016/j.neuron.2014.02.025
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发表时间:
2014-03-05
期刊:
影响因子:
16.2
通讯作者:
Hauschild M
Hauschild M
中科院分区:
医学1区
文献类型:
--
作者:
Andersen RA;Andersen KN;Hwang EJ;Hauschild M

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视性共济失调是一种在后顶叶皮层(PPC)病变时发生的达到视觉目标的高级缺陷。它是巴林特综合征的一个组成部分,还包括注意力和凝视障碍。视性共济失调的方面是在对侧视野中的误触,难以预塑形手以进行抓握,以及无法在线纠正触达。最近在非人类灵长类动物(NHP)中的研究表明,巴林特综合征和视共济失调的许多方面是由于达到,扫视,抓握,注意力和状态估计的特定功能模块受损的结果。人类大病变的缺陷可能是这些功能模块组合损伤的复合效应。这些模块之间的相互作用,无论是在后顶叶皮层还是在额叶皮层的下游,都可以解释更复杂的行为,如手眼协调和伸手抓握。
Optic ataxia is a high order deficit in reaching to visual goals that occurs with posterior parietal cortex (PPC) lesions. It is a component of Balint’s syndrome that also includes attentional and gaze disorders. Aspects of optic ataxia are misreaching in the contralesional visual field, difficulty preshaping the hand for grasping, and an inability to correct reaches online. Recent research in non-human primates (NHPs) suggests that many aspects of Balint’s syndrome and optic ataxia are a result of damage to specific functional modules for reaching, saccades, grasp, attention, and state estimation. The deficits from large lesions in humans are likely composite effects from damage to combinations of these functional modules. Interactions between these modules, either within posterior parietal cortex or downstream within frontal cortex, may account for more complex behaviors such as hand-eye coordination and reach-to-grasp.
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