Sparse coding of natural stimuli in the midbrain
نویسندگان
چکیده
منابع مشابه
Sparse and dense coding of natural stimuli by distinct midbrain neuron subpopulations in weakly electric fish.
While peripheral sensory neurons respond to natural stimuli with a broad range of spatiotemporal frequencies, central neurons instead respond sparsely to specific features in general. The nonlinear transformations leading to this emergent selectivity are not well understood. Here we characterized how the neural representation of stimuli changes across successive brain areas, using the electrose...
متن کاملTitle: Sparse and Dense Coding of Natural Stimuli by Distinct Midbrain Neuron Subpopulations in Weakly Electric Fish
4 Running title: Sparse and dense coding of natural stimuli 5 6 Authors: Katrin Vonderschen and Maurice J. Chacron 7 8 : Department of Physiology, McGill University 9 10 11 : corresponding author: 12 Maurice J. Chacron 13 Department of Physiology 14 McGill University 15 3655 Promenade Sir William Osler, room 1137 16 Montréal, Québec, H3G 1Y6 17 CANADA 18 19 Number of figures: 8 (5 in gray scale...
متن کاملCoding of Naturalistic Stimuli by Auditory Midbrain Neurons
It is known that humans can make finer discriminations between familiar sounds (e.g. syllables) than between unfamiliar ones (e.g. different noise segments). Here we show that a corresponding enhancement is present in early auditory processing stages. Based on previous work which demonstrated that natural sounds had robust statistical properties that could be quantified, we hypothesize that the...
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We show how the principle of sparse coding may be applied to learn the forms of structure occurring in time-varying natural images. A sequence of images is described as a linear superposition of space-time functions , each of which is convolved with a time-varying coeecient signal. When a sparse, independent representation is sought over the coeecients, the basis functions that emerge are space...
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ژورنال
عنوان ژورنال: Frontiers in Neuroscience
سال: 2010
ISSN: 1662-453X
DOI: 10.3389/conf.fnins.2010.03.00279