Figure 4
Texture discrimination and omission detection in the PPC. (A) Median peak ∆R/R of texture evoked responses (touch-responsive and mixed responsive neurons) and Catch-trial responses (Catch-responsive neurons) respectively. (B) Example average calcium transients of neurons that can discriminate textures (top) and those that can report texture omission (bottom). Traces are averages of 20 to 50 trials. (C) Venn diagram of the distribution of discriminating neurons. (D) Performance of neurons discriminating above chance either texture type (left) or presence vs. omission of the texture-stimulus (right). (E) Population level decoding accuracy of texture graininess and texture omission. Horizontal dashed red lines represent chance level. Box plots represent the median, the 25th and 75th percentiles in the boxes, whereas the sidebars represent the 5th and 95th percentiles of the distribution. Open circles represent individual neurons. Bar graphs with error bars and traces with shaded areas represent group averages shown as mean ± s.e.m. Statistical significance is indicated by *** for P < 0.005. No statistically significant differences were found comparing trials in (A).
