I am using the function cohgramcpt to calculate coherence of spike-LFP. I want to know whether the coherence is changing before and after stimulus. The pre and post-stimulus window is both 0.5 ms. I use taper [3,4], moving window [0.3,0.01]. Wish someone could tell me how to align the coherence to stimulus. Should I calculate coherence with moving window separately for pre and post stimulus window? May I do normalization based on precoherence? Thanks!