Role of the posterior parietal cortex in updating reaching movements to a visual target.
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| Title: | Role of the posterior parietal cortex in updating reaching movements to a visual target. |
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| Authors: | Desmurget, M., Epstein, C. M., Turner, R. S., Prablanc, C., Alexander, G. E., Grafton, S. T. |
| Source: | Nature Neuroscience. Jun99, Vol. 2 Issue 6, p563. 5p. |
| Subjects: | Parietal lobe, Motion perception (Vision) |
| Abstract: | The exact role of posterior parietal cortex (PPC) in visually directed reaching is unknown. We propose that, by building an internal representation of instantaneous hand location, PPC computes a dynamic motor error used by motor centers to correct the ongoing trajectory. With unseen right hands, five subjects pointed to visual targets that either remained stationary or moved during saccadic eye movements. Transcranial magnetic stimulation (TMS) was applied over the left PPC during target presentation. Stimulation disrupted path corrections that normally occur in response to target jumps, but had no effect on those directed at stationary targets. Furthermore, left-hand movement corrections were not blocked, ruling out visual or oculomotor effects of stimulation. [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 8829678 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Role of the posterior parietal cortex in updating reaching movements to a visual target. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Desmurget%2C+M%2E%22">Desmurget, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Epstein%2C+C%2E+M%2E%22">Epstein, C. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Turner%2C+R%2E+S%2E%22">Turner, R. S.</searchLink><br /><searchLink fieldCode="AR" term="%22Prablanc%2C+C%2E%22">Prablanc, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Alexander%2C+G%2E+E%2E%22">Alexander, G. E.</searchLink><br /><searchLink fieldCode="AR" term="%22Grafton%2C+S%2E+T%2E%22">Grafton, S. T.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature+Neuroscience%22">Nature Neuroscience</searchLink>. Jun99, Vol. 2 Issue 6, p563. 5p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Parietal+lobe%22">Parietal lobe</searchLink><br /><searchLink fieldCode="DE" term="%22Motion+perception+%28Vision%29%22">Motion perception (Vision)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The exact role of posterior parietal cortex (PPC) in visually directed reaching is unknown. We propose that, by building an internal representation of instantaneous hand location, PPC computes a dynamic motor error used by motor centers to correct the ongoing trajectory. With unseen right hands, five subjects pointed to visual targets that either remained stationary or moved during saccadic eye movements. Transcranial magnetic stimulation (TMS) was applied over the left PPC during target presentation. Stimulation disrupted path corrections that normally occur in response to target jumps, but had no effect on those directed at stationary targets. Furthermore, left-hand movement corrections were not blocked, ruling out visual or oculomotor effects of stimulation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature Neuroscience is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=8829678 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/9219 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 563 Subjects: – SubjectFull: Parietal lobe Type: general – SubjectFull: Motion perception (Vision) Type: general Titles: – TitleFull: Role of the posterior parietal cortex in updating reaching movements to a visual target. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Desmurget, M. – PersonEntity: Name: NameFull: Epstein, C. M. – PersonEntity: Name: NameFull: Turner, R. S. – PersonEntity: Name: NameFull: Prablanc, C. – PersonEntity: Name: NameFull: Alexander, G. E. – PersonEntity: Name: NameFull: Grafton, S. T. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun99 Type: published Y: 1999 Identifiers: – Type: issn-print Value: 10976256 Numbering: – Type: volume Value: 2 – Type: issue Value: 6 Titles: – TitleFull: Nature Neuroscience Type: main |
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