Receptive-field dynamics in the central visual pathways

Citation Info

Gregory C. DeAngelis, Izumi Ohzawa, and Ralph D. Freeman (1995)
Receptive-field dynamics in the central visual pathways.
Trends Neurosci. 18: 451-458.


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Abstract

Neurons in the central visual pathways process visual images within a localized region of space and a restricted epoch of time. Although the receptive field (RF) of a visually-responsive neuron is inherently a spatiotemporal entity, most studies have focused exclusively on spatial aspects of RF structure. Recently, however, the application of sophisticated RF mapping techniques has enabled neurophysiologists to characterize RFs in the joint domain of space and time. Studies employing these techniques have revealed that neurons in the geniculostriate pathway exhibit striking RF dynamics. For a majority of cells, the spatial structure of the RF changes as a function of time; thus, these RFs can be adequately characterized only in the space-time domain. In this review, we focus on the spatiotemporal RF structure of neurons in the lateral geniculate nucleus and primary visual cortex, highlighting some of the implications of recent findings for understanding early visual processing.

See Also

Wang, Y., Qi, X., and Chen, Y. (1996)
Simulations of receptive-field dynamics. Trends Neurosci 19 (September): 385-386. (Letter to the Editor)

Reply (Letter to the Editor, Re: Wang, Qi, Chen)
Izumi Ohzawa, Gregory C. DeAngelis, Ralph D. Freeman (1996) Trends Neurosci 19 (September): 386.

Space-Time Receptive Fields of Visual Neurons: Animations and Slides
Izumi Ohzawa --- Space-time receptive fields of neurons in the early visual pathway are illustrated using animations. Slide files are also available for downloading for making your own color slides for lectures and presentations.