Figure 6.

Changes in sensory responses attributable to conditioning in experiment R20. A, PSTHs from both electrodes in the burst-conditioned pair (top) and interburst-conditioned pair (bottom) generated by stimulation of the corresponding whisker pair. The arrowhead indicates stimulus onset time. Conditioning did not change the PSTH profile for the interburst-conditioned neurons, but for the burst-conditioned neurons, a larger response was evident, particularly after ∼10 msec. The bin size is 1 msec. B, Cortical territories activated by the burst-conditioned whisker pair (top) and the interburst-conditioned whisker pair (bottom) before conditioning (left) and after conditioning (middle and right). The dotted line indicates the territory activated before conditioning. For the burst-conditioned whisker pair, there appears to be an expansion of the activated cortical territory.