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Spike Train decoding
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Summary Decoding of stimulus from response –Two choice case Discrimination ROC curves –Population decoding MAP and ML estimators Bias and variance Fisher information, Cramer-Rao bound –Spike train decoding
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Chapter 4
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Entropy
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Mutual information H_noise< H
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Mutual information
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KL divergence
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Continuous variables
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Entropy maximization
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Population of neurons
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Retinal Ganglion Cell Receptive Fields
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Temporal processing in LGN
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Temporal vs spatial coding
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Entropy of spike trains
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Spike train mutual information measurements quantify stimulus specific aspects of neural encoding. Mutual information of bullfrog peripheral auditory neurons was estimated –1.4 bits/sec for broadband noise stimulus –7.8 bits/sec for bullfrog call-like stimulus
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Summary Information theory quantifies how much a response says about a stimulus –Stimulus, response entropy –Noise entropy –Mutual information, KL divergence Maximizing information transfer yields biological receptive fields –Factorial codes –Equalization –Whitening Spike train mutual information
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