Analysis of Slow (Theta) Oscillations as a Potential Temporal Reference Frame for Information Coding in Sensory Cortices
Figure 5
Response partitioning in face of temporal uncertainty.
A) Schematic of single trial epoch selection for the decoding process assuming a perfect temporal alignment across trials. When composing the codebook for decoding, the epochs for individual trials are all sampled at the same position relative to the stimulus presentation (blue). Hence the reference epoch in the codebook (blue) and the to-be-decoded single trial (black) are in perfect temporal alignment. B) Schematic for a decoding process introducing a temporal uncertainty (jitter) between trials when composing the codebook. The data epochs for individual trials were shifted by a lag value that was randomly sampled for each trial and which was uniformly distributed between −J/2 and +J/2, where J corresponds to the (maximal possible) temporal uncertainty. C) Decoding performance as a function of temporal uncertainty J for auditory cortical data (n = 40 units, T = 160 ms, N = 8, 2–6 Hz LFP). D) Decoding performance as a function of temporal uncertainty J for visual cortical data (n = 37 units, T = 160 ms, N = 8, 2–6 Hz LFP).