Modulation of Fast Narrowband Oscillations in the Mouse Retina and dLGN According to Background Light Intensity

Riccardo Storchi, Robert Bedford, Franck Martial, Annette Allen, Jonathan Wynne, Marcelo Montemurro, Rasmus Petersen, Robert Lucas

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Abstract

Background light intensity (irradiance) substantially impacts the visual code in the early visual system at synaptic and single-neuron levels, but its influence on population activity is largely unexplored. We show that fast narrowband oscillations, an important feature of population activity, systematically increase in amplitude as a function of irradiance in both anesthetized and awake, freely moving mice and at the level of the retina and dorsal lateral geniculate nucleus (dLGN). Narrowband coherence increases with irradiance across large areas of the dLGN, but especially for neighboring units. The spectral sensitivity of these effects and their substantial reduction in melanopsin knockout animals indicate a contribution from inner retinal photoreceptors. At bright backgrounds, narrowband coherence allows pooling of single-unit responses to become a viable strategy for enhancing visual signals within its frequency range.
Original languageEnglish
Pages (from-to)299-307
Number of pages9
JournalNeuron
Volume93
Issue number2
Early online date18 Jan 2017
DOIs
Publication statusPublished - 2017

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