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- W2949111104 startingPage "e1006355" @default.
- W2949111104 abstract "Spontaneous waves in the developing retina are essential in the formation of the retinotopic mapping in the visual system. From experiments in rabbits, it is known that the earliest type of retinal waves (stage I) is nucleated spontaneously, propagates at a speed of 451±91 μm/sec and relies on gap junction coupling between ganglion cells. Because gap junctions (electrical synapses) have short integration times, it has been argued that they cannot set the low speed of stage I retinal waves. Here, we present a theoretical study of a two-dimensional neural network of the ganglion cell layer with gap junction coupling and intrinsic noise. We demonstrate that this model can explain observed nucleation rates as well as the comparatively slow propagation speed of the waves. From the interaction between two coupled neurons, we estimate the wave speed in the model network. Furthermore, using simulations of small networks of neurons (N≤260), we estimate the nucleation rate in the form of an Arrhenius escape rate. These results allow for informed simulations of a realistically sized network, yielding values of the gap junction coupling and the intrinsic noise level that are in a physiologically plausible range." @default.
- W2949111104 created "2019-06-27" @default.
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- W2949111104 date "2019-04-29" @default.
- W2949111104 modified "2023-09-26" @default.
- W2949111104 title "Gap junctions set the speed and nucleation rate of stage I retinal waves" @default.
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- W2949111104 doi "https://doi.org/10.1371/journal.pcbi.1006355" @default.
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