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Stochasticity in Ca2+ Increase in Spines Enables Robust and Sensitive Information Coding

Figure 4

Robust and sensitive probability coding in the stochastic model.

A, Distribution of the Ca2+ response in a single spine (upper panels) and in a cell (lower panels) due to stimulation of PF and CF inputs with fluctuating the PF amplitudes. CVs of the PF amplitudes were 0.1 (left panels) and 0.5 (right panels). B, Input timing information per volume, coded by the Ca2+ response, in a spine (red) and in a cell (black). C, Distribution of the Ca2+ response in a single spine (upper panels) and in a cell (lower panels) with a single PF input (left panels), three PF inputs (middle panels), seven PF inputs (right panels). In a spine, large Ca2+ increase were observed in a few trials in response to three PF inputs (white arrowhead). CV of the PF amplitudes was 0.1. D, Input timing information per volume in a spine (red) and in a cell (black).

Figure 4

doi: https://doi.org/10.1371/journal.pone.0099040.g004