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10 months ago in Neuroscience By Usha K
How do researchers determine the most appropriate low-pass filter cutoff when recording field EPSPs?
I’m setting up extracellular recordings of synaptic activity.Filtering choices seem to affect waveform shape and interpretation.I want guidance grounded in experimental practice rather than theory alone.
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By Kate Answered 9 months ago
From my experience running hippocampal slice recordings, the low-pass cutoff is a balance between noise suppression and preserving slope kinetics. I have seen most labs settle around 1–3 kHz, which maintains the rising phase without introducing distortion. I would recommend validating your choice empirically by checking whether slope measurements remain stable across settings. The optimal cutoff is less about a universal number and more about consistency with your preparation and analysis goals.
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