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• W1998143054 abstract "Cells in the superficial gray layer of the cat superior colliculus show binocular interaction and respond selectively to certain features of a visual stimulus, for example, movement, direction, and size. Although the binocular and directional properties depend on input from the visual cortex, certain spatial properties of the receptive field do not. Neither can they depend exclusively on the retino-collicular input since this is mainly from the contralateral eye. Therefore, the spatial properties must arise from an intrinsic collicular mechanism that can be activated from either eye. Seen with the electron microscope the most striking feature of the synaptic organization is that the dendrites make extensive synaptic contacts with each other. Synapses from the retina and visual cortex terminate on the vesicle-free regions of the dendrites and also on the regions given rise to dendro-dendritic contacts. Retinal and cortical terminals are rare on cell bodies, and neither type makes, nor appears to receive an axo-axonic contact. If the dendro-dendritic contacts are inhibitory, they may represent the basis on which complicated receptive field properties are established in the colliculus using only limited number of cells. Células en la estrata gris superficial del colliculo superior del gato muestran interaccion binocular y responden selectivamente a ciertas caracteristicas del estimulo visual, por ejemplo, movimiento, direccion y tamano. Aunque las propiedades binocular y direccional dependen de la entrada de la corteza visual, otras propiedades espaciales del campos receptivos no dependen del mismo. Tampoco pueden depender exclusivamente de la entrada de la retina pues este proviene principalmente del ojo contralateral. Por lo tanto, las propiedades espaciales deben originarse en un mecanismo intrinsico al colliculo que pueda ser activado por ambos ojos. Visto con el microscopio electrónico la caracteristica mas conspicua de la organization synáptica es lo de que las dendritas establecen extensos contactos synápticos entre si. Las synapsis de la retina y corteza son raras en el cuerpo de las células y ninguna establece ni recibe contacto axo-axonico. Si los contactos dendro-dendriticos producen inhibicion, ellos pueden ser la base donde las propiedades complicadas de los compos receptivos se establecen en el colliculo usando solamente un limitado numéro de células." @default.
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• W1998143054 date "1971-01-01" @default.
• W1998143054 modified "2023-10-18" @default.
• W1998143054 title "Receptive fields and synaptic organization of the superficial gray layer of the cat superior colliculus" @default.
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• W1998143054 doi "https://doi.org/10.1016/0042-6989(71)90048-4" @default.
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