Model of optokinetic responses involving two different visual motion processing pathways.
Prog Brain Res
; 248: 329-340, 2019.
Article
em En
| MEDLINE
| ID: mdl-31239144
ABSTRACT
To understand visual motion processing underlying the optokinetic response (OKR), we developed a biomimetic model that reproduces the findings from behavioral experiments. We recorded OKRs induced by drifting gratings with different spatiotemporal frequencies from humans and non-human primates. The characteristics of the initial open-loop responses and the closed-loop eye velocity gains were analyzed using a model developed in this study. The model consists of two pathways with different dynamics. One mediates the transient response (transient pathway) and the other the sustained response (sustained pathway). Each pathway has a different spatiotemporal frequency dependence. Assuming there are different visual sensitivities for these pathways, one tuned to lower spatial and higher temporal frequencies on the retina and the other tuned to stimulus velocity, we successfully reproduced the course of OKRs. Our results suggest that two different neural circuitries/populations contribute to visual processing in the different stages of OKRs.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Reconhecimento Visual de Modelos
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Vias Visuais
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Nistagmo Optocinético
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Modelos Neurológicos
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Percepção de Movimento
Tipo de estudo:
Prognostic_studies
Limite:
Adult
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Animals
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Humans
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article