Retinal metric: a stimulus distance measure derived from population neural responses

G. Tkacik, E. Granot Atedgi, R. Segev, E. Schneidman, Physical Review Letters 110 (2013).


Journal Article | Published | English
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Abstract
The ability of an organism to distinguish between various stimuli is limited by the structure and noise in the population code of its sensory neurons. Here we infer a distance measure on the stimulus space directly from the recorded activity of 100 neurons in the salamander retina. In contrast to previously used measures of stimulus similarity, this "neural metric" tells us how distinguishable a pair of stimulus clips is to the retina, based on the similarity between the induced distributions of population responses. We show that the retinal distance strongly deviates from Euclidean, or any static metric, yet has a simple structure: we identify the stimulus features that the neural population is jointly sensitive to, and show the support-vector-machine- like kernel function relating the stimulus and neural response spaces. We show that the non-Euclidean nature of the retinal distance has important consequences for neural decoding.
Publishing Year
Date Published
2013-01-28
Journal Title
Physical Review Letters
Volume
110
Issue
5
Article Number
058104
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Cite this

Tkacik G, Granot Atedgi E, Segev R, Schneidman E. Retinal metric: a stimulus distance measure derived from population neural responses. Physical Review Letters. 2013;110(5). doi:10.1103/PhysRevLett.110.058104
Tkacik, G., Granot Atedgi, E., Segev, R., & Schneidman, E. (2013). Retinal metric: a stimulus distance measure derived from population neural responses. Physical Review Letters, 110(5). https://doi.org/10.1103/PhysRevLett.110.058104
Tkacik, Gasper, Einat Granot Atedgi, Ronen Segev, and Elad Schneidman. “Retinal Metric: A Stimulus Distance Measure Derived from Population Neural Responses.” Physical Review Letters 110, no. 5 (2013). https://doi.org/10.1103/PhysRevLett.110.058104.
G. Tkacik, E. Granot Atedgi, R. Segev, and E. Schneidman, “Retinal metric: a stimulus distance measure derived from population neural responses,” Physical Review Letters, vol. 110, no. 5, 2013.
Tkacik G, Granot Atedgi E, Segev R, Schneidman E. 2013. Retinal metric: a stimulus distance measure derived from population neural responses. Physical Review Letters. 110(5).
Tkacik, Gasper, et al. “Retinal Metric: A Stimulus Distance Measure Derived from Population Neural Responses.” Physical Review Letters, vol. 110, no. 5, 058104, American Physical Society, 2013, doi:10.1103/PhysRevLett.110.058104.

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