Figure 8.

Cross-whisker adaptation of layer 4 and layer 2/3 cells. Adaptation induced by repetitive stimulation of one whisker (the PW or the best AW) had only a minor effect on the response to subsequent deflection of the neighboring whisker. Control response for each of the two whiskers is presented in the abscissa of each panel. The amplitude of the adapted response (the 20th response to identical stimuli; see Figs. 6 and 7) is plotted against these values (filled circles), together with the test response amplitude (open circles) measured from single subsequent stimulation. In all cases (different layers and whiskers), on average, the adapted response was significantly smaller than the corresponding control response (p < 0.001). In general, the test response for all layers was similar in amplitude to the corresponding control response; however, a small but significant reduction was measured only for AW stimulation after repetitive stimulation of the PW in layer 2/3 cells (p = 0.016).