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
中科院分区:
文献类型:
--
作者:
Andersen RA;Andersen KN;Hwang EJ;Hauschild M
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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