The role of correlations in direction and contrast coding in the primary visual cortex
The spiking activity of nearby cortical neurons is not independent. Numerous studies have explored the importance of this correlated responsivity for visual coding and perception, often by comparing the information conveyed by pairs of simultaneously recorded neurons with the sum of information prov...
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2007
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/160198 |
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I19-R120-10915-1601982023-11-15T20:06:55Z http://sedici.unlp.edu.ar/handle/10915/160198 The role of correlations in direction and contrast coding in the primary visual cortex Montani, Fernando Fabián Kohn, Adam Smith, Matthew Schultz, Simon R. 2007 2023-11-15T16:36:51Z en Física Neuroscience Neural Coding Visual Cortex cerebral cortex extracellular recording information theory neuronal ensembles redundancy striate cortex synchronization synchrony synergy The spiking activity of nearby cortical neurons is not independent. Numerous studies have explored the importance of this correlated responsivity for visual coding and perception, often by comparing the information conveyed by pairs of simultaneously recorded neurons with the sum of information provided by the respective individual cells. Pairwise responses typically provide slightly more information sothat encodingis weakly synergistic. The simple comparison between pairwise and summedindividual responses conflates several forms of correlation, however, making it impossible to judge the relative importance of synchronous spiking, basic tuning properties, and stimulus-independent and stimulus-dependent correlation. We have applied an information theoretic approach to this question, using the responses of pairs of neurons to drifting sinusoidal gratings of different directions and contrasts that have been recorded inthe primary visual cortex of anesthetized macaque monkeys. Our approach allows usto break downthe information provided by pairs of neurons into a number of components. This analysis reveals that, although synchrony is prevalent and informative, the additional information it provides frequently is offset by the redundancy arising from the similar tuning properties of the two cells. Thus coding is approximately independent with weak synergy or redundancy arising, depending on the similarity in tuning and the temporal precision of the analysis. We suggest that this would allow cortical circuits to enjoy the stability provided by having similarly tuned neurons without suffering the penalty of redundancy, because the associated information transmission deficit is compensated for by stimulus-dependent synchrony. Facultad de Ciencias Exactas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 2338-2348 |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física Neuroscience Neural Coding Visual Cortex cerebral cortex extracellular recording information theory neuronal ensembles redundancy striate cortex synchronization synchrony synergy |
| spellingShingle |
Física Neuroscience Neural Coding Visual Cortex cerebral cortex extracellular recording information theory neuronal ensembles redundancy striate cortex synchronization synchrony synergy Montani, Fernando Fabián Kohn, Adam Smith, Matthew Schultz, Simon R. The role of correlations in direction and contrast coding in the primary visual cortex |
| topic_facet |
Física Neuroscience Neural Coding Visual Cortex cerebral cortex extracellular recording information theory neuronal ensembles redundancy striate cortex synchronization synchrony synergy |
| description |
The spiking activity of nearby cortical neurons is not independent. Numerous studies have explored the importance of this correlated responsivity for visual coding and perception, often by comparing the information conveyed by pairs of simultaneously recorded neurons with the sum of information provided by the respective individual cells. Pairwise responses typically provide slightly more information sothat encodingis weakly synergistic. The simple comparison between pairwise and summedindividual responses conflates several forms of correlation, however, making it impossible to judge the relative importance of synchronous spiking, basic tuning properties, and stimulus-independent and stimulus-dependent correlation. We have applied an information theoretic approach to this question, using the responses of pairs of neurons to drifting sinusoidal gratings of different directions and contrasts that have been recorded inthe primary visual cortex of anesthetized macaque monkeys. Our approach allows usto break downthe information provided by pairs of neurons into a number of components. This analysis reveals that, although synchrony is prevalent and informative, the additional information it provides frequently is offset by the redundancy arising from the similar tuning properties of the two cells. Thus coding is approximately independent with weak synergy or redundancy arising, depending on the similarity in tuning and the temporal precision of the analysis. We suggest that this would allow cortical circuits to enjoy the stability provided by having similarly tuned neurons without suffering the penalty of redundancy, because the associated information transmission deficit is compensated for by stimulus-dependent synchrony. |
| format |
Articulo Articulo |
| author |
Montani, Fernando Fabián Kohn, Adam Smith, Matthew Schultz, Simon R. |
| author_facet |
Montani, Fernando Fabián Kohn, Adam Smith, Matthew Schultz, Simon R. |
| author_sort |
Montani, Fernando Fabián |
| title |
The role of correlations in direction and contrast coding in the primary visual cortex |
| title_short |
The role of correlations in direction and contrast coding in the primary visual cortex |
| title_full |
The role of correlations in direction and contrast coding in the primary visual cortex |
| title_fullStr |
The role of correlations in direction and contrast coding in the primary visual cortex |
| title_full_unstemmed |
The role of correlations in direction and contrast coding in the primary visual cortex |
| title_sort |
role of correlations in direction and contrast coding in the primary visual cortex |
| publishDate |
2007 |
| url |
http://sedici.unlp.edu.ar/handle/10915/160198 |
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