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Optic Ataxia: From Balint’s Syndrome to the Parietal Reach Region

Andersen, Richard A. and Andersen, Kristen N. and Hwang, Eun Jung and Hauschild, Markus (2014) Optic Ataxia: From Balint’s Syndrome to the Parietal Reach Region. Neuron, 81 (5). pp. 967-983. ISSN 0896-6273. PMCID PMC4000741. doi:10.1016/j.neuron.2014.02.025.

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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 nonhuman 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 probably 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.

Item Type:Article
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URLURL TypeDescription CentralArticle
Andersen, Richard A.0000-0002-7947-0472
Additional Information:© 2014 Elsevier Inc. March 5, 2014. We wish to thank the National Eye Institute and the Boswell Foundation for support, Viktor Shcherbatyuk for technical assistance, and Tessa Yao for editorial assistance.
Funding AgencyGrant Number
National Eye InstituteUNSPECIFIED
James G. Boswell FoundationUNSPECIFIED
Issue or Number:5
PubMed Central ID:PMC4000741
Record Number:CaltechAUTHORS:20140320-143105928
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Official Citation:Richard A. Andersen, Kristen N. Andersen, Eun Jung Hwang, Markus Hauschild, Optic Ataxia: From Balint’s Syndrome to the Parietal Reach Region, Neuron, Volume 81, Issue 5, 5 March 2014, Pages 967-983, ISSN 0896-6273, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44426
Deposited On:20 Mar 2014 21:57
Last Modified:10 Nov 2021 16:52

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