Supplementary Figure 1: Pulse waveform, stimulus representation, and example STA and STA'.
From: Spatiotemporal receptive fields of barrel cortex revealed by reverse correlation of synaptic input
a, An example of the waveform of individual pulse deflections (left) with the actual movement of the stimulator overlaid in green. The X,Y representation of movement for a single whisker for 1 second of complex stimuli (right). Below is a schematic of the binary representation of whisker movements for the same whisker in the 8-dimensional stimulus representation. Each whisker's state was represented in a given 1-ms time bin, where a 1 indicates the onset of a deflection in one of eight 45° bins. b, The VWA (left) for three example neurons is used to predict the STA' and compared to the actual STA (middle, and correlation coefficient). The model is also used to predict the STA' for 30000 extra trials of stimuli (right). For some neurons with low firing rates the STA-STA' correlation is low (top) and for some neurons with high firing rates the STA can be noisy (bottom). Nonetheless, for all neurons the VWA can be used to predict the STA' and has high correlation to the true STA (Fig. 1d,e).
