Equation 2 · How Systems and Computational Neuroscience Actually Work
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a baseline fluorescence estimated from a quiet period. Read the equation part by part below; each part has a contextual explanation and a link to its mathematical background.
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subscript
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where is a baseline fluorescence estimated from a quiet period. Spikes are then inferred from this signal, not observed directly — calcium influx is slower than an action potential and low firing rates can fall below detection threshold, so a F/F trace is a lossy, nonlinear encoding of spiking, not a direct spike train. Any claim about “single-spike resolution” from calcium imaging alone should be read skeptically unless the paper validates it against a simultaneous electrode recording.
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