Representational similarity analysis - connecting the branches of systems neuroscience
A fundamental challenge for systems neuroscience is to quantitatively relate its three major branches of research: brain-activity measurement, behavioral measurement, and computational modeling. Using measured brain-activity patterns to evaluate computational network models is complicated by the nee...
| Format: | Article |
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| Language: | English |
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Frontiers Media S.A.
2008-11-01
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| Series: | Frontiers in Systems Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/neuro.06.004.2008/full |
| _version_ | 1818564793026478080 |
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| collection | DOAJ |
| description | A fundamental challenge for systems neuroscience is to quantitatively relate its three major branches of research: brain-activity measurement, behavioral measurement, and computational modeling. Using measured brain-activity patterns to evaluate computational network models is complicated by the need to define the correspondency between the units of the model and the channels of the brain-activity data, e.g. single-cell recordings or voxels from functional magnetic resonance imaging (fMRI). Similar correspondency problems complicate relating activity patterns between different modalities of brain-activity measurement, and between subjects and species. In order to bridge these divides, we suggest abstracting from the activity patterns themselves and computing representational dissimilarity matrices, which characterize the information carried by a given representation in a brain or model. We propose a new experimental and data-analytical framework called representational similarity analysis (RSA), in which multi-channel measures of neural activity are quantitatively related to each other and to computational theory and behavior by comparing representational dissimilarity matrices. We demonstrate RSA by relating representations of visual objects as measured with fMRI to computational models spanning a wide range of complexities. We argue that these ideas, which have deep roots in psychology and neuroscience, will allow the integrated quantitative analysis of data from all three branches, thus contributing to a more unified systems neuroscience. |
| first_indexed | 2024-12-14T01:33:13Z |
| format | Article |
| id | doaj.art-98d4f3c41b804223bbc8dad55d87055d |
| institution | Directory Open Access Journal |
| issn | 1662-5137 |
| language | English |
| last_indexed | 2024-12-14T01:33:13Z |
| publishDate | 2008-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Systems Neuroscience |
| spelling | doaj.art-98d4f3c41b804223bbc8dad55d87055d2022-12-21T23:21:59ZengFrontiers Media S.A.Frontiers in Systems Neuroscience1662-51372008-11-01210.3389/neuro.06.004.2008249Representational similarity analysis - connecting the branches of systems neuroscienceA fundamental challenge for systems neuroscience is to quantitatively relate its three major branches of research: brain-activity measurement, behavioral measurement, and computational modeling. Using measured brain-activity patterns to evaluate computational network models is complicated by the need to define the correspondency between the units of the model and the channels of the brain-activity data, e.g. single-cell recordings or voxels from functional magnetic resonance imaging (fMRI). Similar correspondency problems complicate relating activity patterns between different modalities of brain-activity measurement, and between subjects and species. In order to bridge these divides, we suggest abstracting from the activity patterns themselves and computing representational dissimilarity matrices, which characterize the information carried by a given representation in a brain or model. We propose a new experimental and data-analytical framework called representational similarity analysis (RSA), in which multi-channel measures of neural activity are quantitatively related to each other and to computational theory and behavior by comparing representational dissimilarity matrices. We demonstrate RSA by relating representations of visual objects as measured with fMRI to computational models spanning a wide range of complexities. We argue that these ideas, which have deep roots in psychology and neuroscience, will allow the integrated quantitative analysis of data from all three branches, thus contributing to a more unified systems neuroscience.http://journal.frontiersin.org/Journal/10.3389/neuro.06.004.2008/fullElectrophysiologycomputational modelingfMRIrepresentationSimilaritypopulation code |
| spellingShingle | Representational similarity analysis - connecting the branches of systems neuroscience Frontiers in Systems Neuroscience Electrophysiology computational modeling fMRI representation Similarity population code |
| title | Representational similarity analysis - connecting the branches of systems neuroscience |
| title_full | Representational similarity analysis - connecting the branches of systems neuroscience |
| title_fullStr | Representational similarity analysis - connecting the branches of systems neuroscience |
| title_full_unstemmed | Representational similarity analysis - connecting the branches of systems neuroscience |
| title_short | Representational similarity analysis - connecting the branches of systems neuroscience |
| title_sort | representational similarity analysis connecting the branches of systems neuroscience |
| topic | Electrophysiology computational modeling fMRI representation Similarity population code |
| url | http://journal.frontiersin.org/Journal/10.3389/neuro.06.004.2008/full |