An emergent model of orientation selectivity in cat visual cortical simple cells
نویسندگان
چکیده
منابع مشابه
An emergent model of orientation selectivity in cat visual cortical simple cells.
It is well known that visual cortical neurons respond vigorously to a limited range of stimulus orientations, while their primary afferent inputs, neurons in the lateral geniculate nucleus (LGN), respond well to all orientations. Mechanisms based on intracortical inhibition and/or converging thalamocortical afferents have previously been suggested to underlie the generation of cortical orientat...
متن کاملJournal of Neuroscience in press AN EMERGENT MODEL OF ORIENTATION SELECTIVITY IN CAT VISUAL CORTICAL SIMPLE CELLS
It is well known that visual cortical neurons respond vigorously to a limited range of stimulus orientations while their primary a erent inputs neurons in the lateral geniculate nucleus LGN respond well to all orientations Mechanisms based on intracortical inhibition and or converging thalamocortical a erents have previ ously been suggested to underlie the generation of cortical orientation sel...
متن کاملAn Emergent Model of Visual Cortical Orientation Selectivity
We demonstrate a cortical circuit based on known anatomical details and cellular properties which achieves sharp orientation tuning despite poorly tuned thalamo-cortical input. Sharp tuning arises emergently from excitatory interactions between similarly tuned neurons, which also receive broadly tuned inhibition. This model accounts for data obtained from intracellular recording and pharmacolog...
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The primary visual cortex of carnivores and primates shows an orderly progression of domains of neurons that are selective to a particular orientation of visual stimuli such as bars and gratings. We recorded from single-thalamic afferent fibers that terminate in these domains to address the issue whether the orientation sensitivity of these fibers could form the basis of the remarkable orientat...
متن کاملPrediction of Orientation Selectivity from Receptive Field Architecture in Simple Cells of Cat Visual Cortex
From the intracellularly recorded responses to small, rapidly flashed spots, we have quantitatively mapped the receptive fields of simple cells in the cat visual cortex. We then applied these maps to a feedforward model of orientation selectivity. Both the preferred orientation and the width of orientation tuning of the responses to oriented stimuli were well predicted by the model. Where teste...
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ژورنال
عنوان ژورنال: The Journal of Neuroscience
سال: 1995
ISSN: 0270-6474,1529-2401
DOI: 10.1523/jneurosci.15-08-05448.1995