Model of optokinetic responses involving two different visual motion processing pathways.
Prog Brain Res
; 248: 329-340, 2019.
Article
en 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.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Reconocimiento Visual de Modelos
/
Vías Visuales
/
Nistagmo Optoquinético
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Modelos Neurológicos
/
Percepción de Movimiento
Tipo de estudio:
Prognostic_studies
Límite:
Adult
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Animals
/
Humans
Idioma:
En
Revista:
Prog Brain Res
Año:
2019
Tipo del documento:
Article