JoVE Neuroscience Mikko Juusola1,2, An Dau2, Lei Zheng1, Diana Rien1,2 1National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, 2Department of Biomedical Science, The University of Sheffield Nature. Feb, 2003  |  Pubmed ID: 12571596 An array of rapidly inactivating voltage-gated K+ channels is distributed throughout the nervous systems of vertebrates and invertebrates. Although these channels are thought to regulate the excitability of neurons by attenuating voltage signals, their specific functions are often poorly understood. We studied the role of the prototypical inactivating K+ conductance, Shaker, in Drosophila photoreceptors by recording intracellularly from wild-type and Shaker mutant photoreceptors. Here we show that loss of the Shaker K+ conductance produces a marked reduction in the signal-to-noise ratio of photoreceptors, generating a 50% decrease in the information capacity of these cells in fully…

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