Fig 7. L-N model performance varies with the simulated distance during turbulent stimuli.

(A) Response of two ORNs to turbulent stimuli simulating distances of 16 m (top, R² = 0.63) and 64 m (bottom, R² = 0.65). Same conventions as in Fig 1B. (B) Heatmap of the median coefficient of determination (R²) between L-N model prediction and measured ORN responses, plotted as a function of pheromone load and distance. Note that at high pheromone load, R² is higher for short distances, but this is not true anymore for low pheromone loads. (C) Cell distribution of R² between L-N prediction and measured ORN responses. Grey dots are R² for individual cells, black segments show the median values. For each pheromone load value, the distance of the odorant source is 8, 16, 32 and 64 m from left to right. (D) Response of a PN to turbulent stimuli simulating distances of 16 m (top, R² = 0.69) and 64 m (bottom, R² = 0.66). Same conventions as in Fig 1B. (E) R² between L-N prediction and measured PN response decreases with distance. One cell is represented by up to 4 dots joined by a grey line. Black line, median value. The example PNs from (D) are shown with red symbols. R² decreased linearly with the log of the distance (**: p<0.01, permutation test applied on linear regression ramp).