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• W2022128637 startingPage "e1003953" @default.
• W2022128637 abstract "Prior to receiving visual stimuli, spontaneous, correlated activity called retinal waves drives activity-dependent developmental programs. Early-stage waves mediated by acetylcholine (ACh) manifest as slow, spreading bursts of action potentials. They are believed to be initiated by the spontaneous firing of Starburst Amacrine Cells (SACs), whose dense, recurrent connectivity then propagates this activity laterally. Their extended inter-wave intervals and shifting wave boundaries are the result of the slow after-hyperpolarization of the SACs creating an evolving mosaic of recruitable and refractory cells, which can and cannot participate in waves, respectively. Recent evidence suggests that cholinergic waves may be modulated by the extracellular concentration of ACh. Here, we construct a simplified, biophysically consistent, reaction-diffusion model of cholinergic retinal waves capable of recapitulating wave dynamics observed in mice retina recordings. The dense, recurrent connectivity of SACs is modeled through local, excitatory coupling occurring via the volume release and diffusion of ACh. In contrast with previous, simulation-based models, we are able to use non-linear wave theory to connect wave features to underlying physiological parameters, making the model useful in determining appropriate pharmacological manipulations to experimentally produce waves of a prescribed spatiotemporal character. The model is used to determine how ACh mediated connectivity may modulate wave activity, and how the noise rate and sAHP refractory period contributes to critical wave size variability." @default.
• W2022128637 created "2016-06-24" @default.
• W2022128637 creator A5007228523 @default.
• W2022128637 creator A5018372746 @default.
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• W2022128637 date "2014-12-04" @default.
• W2022128637 modified "2023-10-13" @default.
• W2022128637 title "A Reaction-Diffusion Model of Cholinergic Retinal Waves" @default.
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• W2022128637 doi "https://doi.org/10.1371/journal.pcbi.1003953" @default.
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• W2022128637 hasPublicationYear "2014" @default.
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