Figure 3.
Population PSTHs for Touch (red) and Whisking (black) conditions in various cortical layers. A, Layer 2/3 (L2/3; n = 34 neurons). B, Layer 4 barrels (L4; n = 29). C, Layer 5a (L5a; n = 28). Protraction onset times are marked by vertical dashed lines every 200 ms. Pi and Ri denote specific response phases during protractions and retractions, respectively. Contact time was 10.5 ± 1.4 ms (mean ± SEM) in A, 8.0 ± 1.9 ms in B, and 9.2 ± 3.0 ms in C. Representative CO-stained coronal sections of the barrel cortex with lesions in layers 2/3 (top), 4-barrel (middle), and 5a (bottom) are presented at the right. The arrows point toward sites of lesions. D, Comparison of mean responses in first cycle (blue and orange lines) and in steady state (black and red lines; mean of cycles, 5–10) for Whisking (top) and Touch (bottom) conditions. W, Whisking condition; T, Touch condition.