| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000436093 |
| ISSN: | 0001-3765 |
| Authors: | Diogo, Antonia Cintra M1 Lima, Bruss1 Soares, Juliana G.M1 Gattass, Ricardo1 |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Instituto de Biofisica Carlos Chagas Filho, Rio de Janeiro. Brasil |
| Year: | 2020 |
| Volumen: | 92 |
| Number: | 2 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | We studied the multiunit responses to moving and static stimuli from 585 cell clusters in area MT using multi-electrode arrays. Our aim was to explore if MT columns exhibit any larger-scale tangential organization or clustering based on their response properties. Neurons showing both motion and orientation selectivity were classified into four categories: 1- Type I (orientation selectivity orthogonal to the axis of motion); 2- Type II (orientation selectivity coaxial to the axis of motion); 3- Type DS (significant response to moving stimuli, but non-significant response to static stimuli); and 4- Type OS (significant orientation selectivity, but non-significant direction selectivity). Type I (34%), Type II (24%) and Type DS (32%) clusters were the most predominant and may be associated with different stages of motion processing in MT. On the other hand, the rarer Type OS (9%) may be integrating motion and form processing. Type I and unidirectional sites were the only classes to exhibit significant clustering. Type OS sites showed a trend for clustering, which did not reach statistical significance. We also found a trend for unidirectional sites to have bidirectional sites as neighbors. In conclusion, neuronal clustering associated with these four categories may be related to distinct MT functional circuits |
| Disciplines: | Biología |
| Keyword: | Fisiología animal, Mamíferos, Primates, Sistema visual, Corteza extraestriada, Estímulos estáticos, Tipos celulares, Orientación selectiva |
| Keyword: | Animal physiology, Mammals, Cell types, Static stimuli, Selective orientation, Extrastriate cortex, Visual system, Primates |
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