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Visual-Motor Transformations Within Frontal Eye Fields During Head-Unrestrained Gaze Shifts in the Monkey.
Sajad, Amirsaman; Sadeh, Morteza; Keith, Gerald P; Yan, Xiaogang; Wang, Hongying; Crawford, John Douglas.
Afiliación
  • Sajad A; Centre for Vision Research Canadian Action and Perception Network (CAPnet) Neuroscience Graduate Diploma Program Department of Biology.
  • Sadeh M; Centre for Vision Research Canadian Action and Perception Network (CAPnet) Neuroscience Graduate Diploma Program School of Kinesiology and Health Sciences.
  • Keith GP; Centre for Vision Research Canadian Action and Perception Network (CAPnet) Department of Psychology, York University, Toronto, ON, Canada M3J 1P3.
  • Yan X; Centre for Vision Research Canadian Action and Perception Network (CAPnet).
  • Wang H; Centre for Vision Research Canadian Action and Perception Network (CAPnet).
  • Crawford JD; Centre for Vision Research Canadian Action and Perception Network (CAPnet) Neuroscience Graduate Diploma Program Department of Biology School of Kinesiology and Health Sciences Department of Psychology, York University, Toronto, ON, Canada M3J 1P3.
Cereb Cortex ; 25(10): 3932-52, 2015 Oct.
Article en En | MEDLINE | ID: mdl-25491118
A fundamental question in sensorimotor control concerns the transformation of spatial signals from the retina into eye and head motor commands required for accurate gaze shifts. Here, we investigated these transformations by identifying the spatial codes embedded in visually evoked and movement-related responses in the frontal eye fields (FEFs) during head-unrestrained gaze shifts. Monkeys made delayed gaze shifts to the remembered location of briefly presented visual stimuli, with delay serving to dissociate visual and movement responses. A statistical analysis of nonparametric model fits to response field data from 57 neurons (38 with visual and 49 with movement activities) eliminated most effector-specific, head-fixed, and space-fixed models, but confirmed the dominance of eye-centered codes observed in head-restrained studies. More importantly, the visual response encoded target location, whereas the movement response mainly encoded the final position of the imminent gaze shift (including gaze errors). This spatiotemporal distinction between target and gaze coding was present not only at the population level, but even at the single-cell level. We propose that an imperfect visual-motor transformation occurs during the brief memory interval between perception and action, and further transformations from the FEF's eye-centered gaze motor code to effector-specific codes in motor frames occur downstream in the subcortical areas.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Desempeño Psicomotor / Movimientos Sacádicos / Percepción Visual / Lóbulo Frontal / Cabeza / Neuronas Límite: Animals Idioma: En Revista: Cereb Cortex Asunto de la revista: CEREBRO Año: 2015 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Desempeño Psicomotor / Movimientos Sacádicos / Percepción Visual / Lóbulo Frontal / Cabeza / Neuronas Límite: Animals Idioma: En Revista: Cereb Cortex Asunto de la revista: CEREBRO Año: 2015 Tipo del documento: Article Pais de publicación: Estados Unidos