Steady state evoked potential (SSEP) responses in the primary and secondary somatosensory cortices of anesthetized cats: Nonlinearity characterized by harmonic and intermodulation frequencies
Fig 10
Exemplar channel’s observed and modelled responses.
(A) Bipolar channel 43 in S1 (Session 2–2)’s logSNR (black) is compared to the optimally fitted models from four model architectures based on Rect functions. The best parameters for each model are the following. Rect-1 (red): -0.023Rect(X)+1.0Rect(Y), Rect-2 (blue): -0.98Rect(X)+58Rect(Y)-0.90Rect(XY), Rect-3 (purple): -0.98Rect(X)+30Rect(Y)+0.094Rect(X)Rect(Y) and Rect-4 (yellow): 1.8Rect(X)+55Rect(Y)+0.48Rect(XY)-2.4Rect(X)Rect(Y). (See S8 Fig for parameters from other channels.) The respective sums of logSNR differences from the observed logSNR across the frequencies of interest are 130, 105, 83 and 79. (B) Difference between the observed and the best model at the frequencies of interest. Color scheme is the same as in (A).