Flexible strategies for sensory integration during motor planning
Identifieur interne : 000689 ( Pmc/Curation ); précédent : 000688; suivant : 000690Flexible strategies for sensory integration during motor planning
Auteurs : Samuel J. Sober ; Philip N. SabesSource :
- Nature neuroscience [ 1097-6256 ] ; 2005.
Abstract
When planning target-directed reaching movements, human subjects combine visual and proprioceptive feedback to form two estimates of the arm’s position: one to plan the reach direction, and another to convert that direction into a motor command. These position estimates are based on the same sensory signals but rely on different combinations of visual and proprioceptive input, suggesting that the brain weights sensory inputs differently depending on the computation being performed. Here we show that the relative weighting of vision and proprioception depends on both the sensory modality of the target and the information content of the visual feedback, and that these factors affect the two stages of planning independently. The observed diversity of weightings demonstrates the flexibility of sensory integration, and suggests a unifying principle by which the brain chooses sensory inputs in order to minimize errors arising from the transformation of sensory signals between coordinate frames.
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DOI: 10.1038/nn1427
PubMed: 15793578
PubMed Central: 2538489
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<front><journal-meta><journal-id journal-id-type="nlm-journal-id">9809671</journal-id><journal-id journal-id-type="pubmed-jr-id">21092</journal-id><journal-id journal-id-type="nlm-ta">Nat Neurosci</journal-id><journal-title>Nature neuroscience</journal-title><issn pub-type="ppub">1097-6256</issn><issn pub-type="epub">1546-1726</issn></journal-meta><article-meta><article-id pub-id-type="pmid">15793578</article-id><article-id pub-id-type="pmc">2538489</article-id><article-id pub-id-type="doi">10.1038/nn1427</article-id><article-id pub-id-type="manuscript">NIHMS58686</article-id><article-categories><subj-group subj-group-type="heading"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Flexible strategies for sensory integration during motor planning</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Sober</surname><given-names>Samuel J.</given-names></name></contrib><contrib contrib-type="author"><name><surname>Sabes</surname><given-names>Philip N.</given-names></name></contrib><aff id="A1">Department of Physiology, W.M. Keck Foundation Center for Integrative Neuroscience, and Neuroscience Graduate Program, University of California, San Francisco, San Francisco, CA 94143-0444</aff></contrib-group><author-notes><corresp id="FN1">Please address correspondence to: Philip Sabes, Department of Physiology, 513 Parnassus Avenue, UCSF, San Francisco, CA 94143-0444, 415-476-0364, 415-476-4929 (fax), <email>sabes@phy.ucsf.edu</email></corresp></author-notes><pub-date pub-type="nihms-submitted"><day>15</day><month>7</month><year>2008</year></pub-date><pub-date pub-type="epub"><day>27</day><month>3</month><year>2005</year></pub-date><pub-date pub-type="ppub"><month>4</month><year>2005</year></pub-date><pub-date pub-type="pmc-release"><day>16</day><month>9</month><year>2008</year></pub-date><volume>8</volume><issue>4</issue><fpage>490</fpage><lpage>497</lpage><abstract><p id="P1">When planning target-directed reaching movements, human subjects combine visual and proprioceptive feedback to form two estimates of the arm’s position: one to plan the reach direction, and another to convert that direction into a motor command. These position estimates are based on the same sensory signals but rely on different combinations of visual and proprioceptive input, suggesting that the brain weights sensory inputs differently depending on the computation being performed. Here we show that the relative weighting of vision and proprioception depends on both the sensory modality of the target and the information content of the visual feedback, and that these factors affect the two stages of planning independently. The observed diversity of weightings demonstrates the flexibility of sensory integration, and suggests a unifying principle by which the brain chooses sensory inputs in order to minimize errors arising from the transformation of sensory signals between coordinate frames.</p></abstract><contract-num rid="EY1">R01 EY015679-01A2</contract-num><contract-sponsor id="EY1">National Eye Institute : NEI</contract-sponsor></article-meta></front></pmc></record>Pour manipuler ce document sous Unix (Dilib)
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