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dc.contributor.authorDiCarlo, James
dc.contributor.authorRust, Nicole C.
dc.date.accessioned2013-02-06T17:18:07Z
dc.date.available2013-02-06T17:18:07Z
dc.date.issued2012-07
dc.date.submitted2012-04
dc.identifier.issn0270-6474
dc.identifier.issn1529-2401
dc.identifier.urihttp://hdl.handle.net/1721.1/76751
dc.description.abstractAlthough popular accounts suggest that neurons along the ventral visual processing stream become increasingly selective for particular objects, this appears at odds with the fact that inferior temporal cortical (IT) neurons are broadly tuned. To explore this apparent contradiction, we compared processing in two ventral stream stages (visual cortical areas V4 and IT) in the rhesus macaque monkey. We confirmed that IT neurons are indeed more selective for conjunctions of visual features than V4 neurons and that this increase in feature conjunction selectivity is accompanied by an increase in tolerance (“invariance”) to identity-preserving transformations (e.g., shifting, scaling) of those features. We report here that V4 and IT neurons are, on average, tightly matched in their tuning breadth for natural images (“sparseness”) and that the average V4 or IT neuron will produce a robust firing rate response (>50% of its peak observed firing rate) to ∼10% of all natural images. We also observed that sparseness was positively correlated with conjunction selectivity and negatively correlated with tolerance within both V4 and IT, consistent with selectivity-building and invariance-building computations that offset one another to produce sparseness. Our results imply that the conjunction-selectivity-building and invariance-building computations necessary to support object recognition are implemented in a balanced manner to maintain sparseness at each stage of processing.en_US
dc.description.sponsorshipNational Eye Institute (Grant 1F32EY018063)en_US
dc.description.sponsorshipNational Eye Institute (Grant R01EY014970)en_US
dc.description.sponsorshipMcKnight Endowment Fund for Neuroscienceen_US
dc.language.isoen_US
dc.publisherSociety for Neuroscienceen_US
dc.relation.isversionofhttp://dx.doi.org/10.1523/jneurosci.6125-11.2012en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceSFNen_US
dc.titleBalanced Increases in Selectivity and Tolerance Produce Constant Sparseness along the Ventral Visual Streamen_US
dc.typeArticleen_US
dc.identifier.citationRust, N. C., and J. J. DiCarlo. “Balanced Increases in Selectivity and Tolerance Produce Constant Sparseness Along the Ventral Visual Stream.” Journal of Neuroscience 32.30 (2012): 10170–10182.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Brain and Cognitive Sciencesen_US
dc.contributor.departmentMcGovern Institute for Brain Research at MITen_US
dc.contributor.mitauthorDiCarlo, James
dc.contributor.mitauthorRust, Nicole C.
dc.relation.journalJournal of Neuroscienceen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsRust, N. C.; DiCarlo, J. J.en
dc.identifier.orcidhttps://orcid.org/0000-0002-1592-5896
mit.licensePUBLISHER_POLICYen_US
mit.metadata.statusComplete


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